You need to see just exactly what is in that kit to know for sure. I would guess that the personal kit is things like sewer hose, water hose, pots & pans, dishes and such. But without knowing what is in it, we really can't advise you.
we rent 2 types of packages for bedding and cookware.
The Personal Kit costs $35 per person, for the duration of the trip. It includes a sleeping bag, pillow, pillowcase, flat sheet, bath towel, wash cloth and dishtowel. All items must be returned at end of trip.
The Vehicle Provisioning Kit costs $85 per vehicle, also for the duration of the trip. It includes a flashlight, can opener, bottle opener, broom with dust pan, plastic pail, spatula, cooking spoon, cooking fork, coffee cups, tumblers, plates, soup bowls, silverware, platter, tea kettle, colander, mixing bowl, and a cookware set. All item must be returned clean at end of trip.
OUCH! I think your first thought was a good one. If you don't want the stuff when you get back have a garage sale. I think you could buy that stuff for a lot less, if that's all there is to it. Did the list come from the Cruise America site?