Originally Posted by bigskypc50
I tired for weeks to design a layout on the computer, worthless in the end really, just use your brain and string and tape.
Others have suggested metal tent camping to get a feel for where you want stuff.
Crawl underneath and take measurements and look for places to put your tanks/gen/etc.
Some people don't like entrance door up front as copilot seat missing, so they close it off and use old stairwell for generator. Then get RV door for further down bus.