[Bob Landry]

Depending on where you want to add them, you will likely run into styrofoam insulation in the walls and it will be next to impossible to run any kind of wiring through it.
I've done a lot of wiring mods on my Outback including adding an additional 30A service I and ran romex under the trailer and up into open areas of the cabinetry. Kitchen cabinets are the easiest to snake your wire through.
Don't be afraid to cut access opening in the coroplast. It's easily patched with Gorilla Tape.
Don't forget that any outlet exposed to the elements needs to be either wired off of a GFCI outlet or it's own GFCI breaker.