If I had the RT in the driveway, I'd fire it up a couple days before a trip, not just to pre-chill it, but in case there is an issue, you can possibly get it fixed before you have to head out with a dead fridge. There are many full-timers using these fridges 24/7/365.25, and because the only moving part is the liquid, it can't hurt to keep it going. My preference is to run it on propane, but one can go either way.
Of course, this is assuming the fridge is on a level stretch. RV absorption fridges will self destruct (and the damage is cumulative) if left on and out of plumb for any real length of time.