I came across a product on walmart.com that inspired me to come up with a "Budget RTT Changing Room" idea. Here's the product:
What's interesting about this product is that it's two walls for a 10 x 10 canopy and one of the walls has a zipper down the middle to form a door. Two walls of a 10 x 10 means the running length is 20'. A typical RTT is 4-5' on a side, so this product could form four walls of a changing room for a roof top tent.
Many roof top tents have a channel around the platform that the tent canvas attaches to. Here's a photo of my RTT; the canvas attaches to the top edge of the platform and there's a channel on the bottom side as well (and you can see my canvas needs a little adjustment at the corner):
The channel is designed to accept "Awning Rope", which has a round "bulb" edge that slides into the channel, and a flat edge that can be sewn to:
The concept is this: take the $32.95 Canopy Wall Set product as found on walmart.com, sew Awning Rope to the top edge and you've got a changing room that'll slide right into the channel on the bottom of the RTT platform.
It's almost that simple, although there are a few small details to pay attention to, such as where the channel passes the ladder, in most cases the ladder brackets would cause the fabric to go outside of the ladder when you'd really want it inside the ladder. Not a hard problem to solve though. Also the edge of the platform that hinges when the RTT folds typically doesn't have a channel, so if the changing room is to have fabric on the side against the Jeep you'd need to add channel there. Channel is available and not too expensive so that's easily solved as well:
I think I'll order one of the awning wall sets from Walmart and some awning rope (sailrite.com) to put a changing room together. The first question to answer is... which color? The canopy wall set comes in black, white, and these 3 colors (I wouldn't mount the RTT so the changing room is over the back of the Jeep as shown below because it would interfere with the kitchen, but this photo was handy to do the concept drawings so I used it):
None of these colors match my RTT, but they're not too bad. What color do you guys like?