I've not quilted in an RV, but I have taken quilting to a condo we stayed at over the winter. I did exactly as you are suggesting. I cut all the pieces before I left and assembled them in the condo. I would take fabric for an extra block or two just in case you make a mistake. I'd be sure to take a couple extra sewing machine needles. I'd take a high-powered portable light in case you need it. I didn't try to do any borders. Time for that when you get home. Small projects like table runners, wall hangings and placemats are great to work on in a small space. Enjoy yourself and safe travels.