The origional intent of a lay flat frame is that it would generally only be used in a double sided panel. thus you have a boxed beam structural element that is only 2 1/4 inches thick and stores well. If you chose to go single sided then put plywood triangles or squares at each corner. The fram is not affixed to each other member, only to the outside panel. If a panel was to be replaced or even one of the frame peices becomes damaged it can be removed as an individual component and replaced.
Unfortunately with the single sided version, you will be replacing single components regularly as the week point is not the lumber so much as the edges not being connected and leverage takes over and rips all the screws. The boxed beam thin panels are really only intended for triangular grids where the longest length unsupported by over head bracing would be no more than 3 panels and the best method is to have sections that come in assembled 2 section and 3 section long assemblies even of the mystical interlocking panel design.
The name of the clip at either Home Depot or Lowes is Simpson Strong Tie A-21 using 4 per joint, one on either side of the panel at the top and bottom. If you are doing flat walls and 90 degree angles there is the A-15 or these larger and cheaper units can replace the back A-21 units just to conver more surface area and be less expensive.
In either case these ties are bent as needed to any angle or shape or left as a 90 or made into a 120 or made flat. Any time there is a long 3 or more section wall a continuous piece of lumber goes all the way across the top and sometimes even the bottom of a panel to keep them straight or such a beam is added to the top bracing scheme.
It is cheaper to not have any of these Simpson strong tie deals and use conventional 2x4 on edge and screw panels together. This whole tie thing is just for weird 60 degree, 120 degree and 30 degree configurations. The whole system is intended to be on a carpet or shims placed where ever strong contact to the floor has not occured. This is intended for not having the ability to tie things into the floor and not leaving a scared floor behind.
Storage is an ongoing expense so thinner is better as generally most rents or space utilization costs seem to go by square footage. If yo have a trailer haunt or a permnanent location, it makes no difference as how they will be stored. Thinner also means more weight per square foot of storage and more weight possibly leaning against something off season.
It is preferable to have panels stored on edge so the painted surfaces don't compress with the full weight of all the panels and the paint becomes a bonding material laminating all of your walls together requiring damage just to seperate them.
2x3s suck in a Simpson Strong Tie design as there isn't enough meat for screws to not damage framing lumber. They are lighter by about 10 pounds per panel but, cost exactly the same as 2x4 construction.
Single sided with 2x4s and 3/8 plywood wiegh 60 pounds after paint. Double side are 85 to 90 pounds. How much do you weigh and what percentage of your body weight can you lift 200 to 1300 times before herniation or back disc rupture. Are all of your build up crew 12 year olds? Are you going to hire a Lepar colony for a day (Leprosy makes no pain available at the extremities, it's fun get some) ?
If you hurt yourself and everyone else, it may be mid June before the chiropractic care takes hold and everyone is bright and cheery again.
Most, No ALL of the damage to a haunt is not from customers, it is from the handling in moving and actors beating on it while it is up. Think Samsonite Gorilla. There might be one special spot ( or two) where customers back into so this get s extra attention in construction.
Thin walls are for triangular grid or very small rooms only. Big rooms think 8 foot by 8 foot panels screwed together with the frame on edge and connected at each edge with more screws. Think 4 helpers per wall or 2 helpers per wall for a 4x8 or at least 4 12 year olds for a 4 x 8. You may laugh but this has occured so many times now.
If you use nails, staples or glue you have just made disposable panels. How will you dispose of them?
Single sided means you already have a back problem or have no money. If it is the back problem there is a whole series of good metal corners and brackets to fasten to each edge, there are also 3 inch screws and counter sink tips to consider.
Just go to the end of the lumber rack and push one of those buttons, I just love that womans robot voice "special assistance needed in the key cutting area." Just push all the buttons.
Another fabulous post from the U.S.Department of Wild Imaginings, now in spectaclar stereo, sponsored by the Adhesives and Sealants Council, suggesting ways to stick things together since the 1800s. Not fabulous in a gay way. Your results may vary. Illinois residents add 8% sales tax. These posts have been made by professional post makers, do not try this type of posting on your own without extensive training, lovely assistants and a trusty clown horn.