See if you can get ahold of Sonusman. He had a Winnebago with a Ghost he used for a remote for a while.
You'll need a quiet, reliable generator, and I wouldn't go with less than say a 60amp 120/240v. service. You'll also want provision for shore power so you don't always need the genset. So you need a transfer switch too, so you're not jazzing shore power up your generator, and vice-versa.
For your shore-power setup, you might be better-prepared with two *seperate* 30-amp service panels than a single 60amp setup. Because 30a/4-wire 120/240v is gonna be the most common shore power supply you're gonna find, like an electric dryer outlet or range. You'll also want to have something like a Leviton L14-30 cord cap. Doesn't necessarily have to be weatherproof.
http://www.leviton.com/levitoncanada/sections/prodinfo/plugs/sheets/wetguard.htmYou may need to make some adapters to go from different cord cap configurations. Be sure whatever the source of your power that it has a NEUTRAL AND GROUND. Get a Knopf Wiggy or similar (at the very least), learn how to use it, AND USE IT RELIGIOUSLY!
Good power conditioning will be essential.
Then you'll need a patchbay to interface remote snakes into the rig, and a REALLY NICE snake setup, heavy-duty as you can find or build.
A Lo-Jack might be a good idea too.
Does it have a roof-mounted AC unit? You need something so you and the gear don't overheat.