Be sure to take a notebook and pen ;)
Before you go, take some time in your driveway and hang out in there, have lunch, make the beds and have a nap.
That will help you make sure you have the basics covered.
We picked up a couple of these at Walmart this year for the camper.
Soft so they don't scratch or mark anything during tansport, soft bottoms are easy on the floor, and can be fluffed up for stiff back or loosened up for lazy support.
Originally got a pair for the kids, but then bought another pair for us! Adds seating and lounging capabilities in addition to the couch and chairs.