We used to do that when we had the travel trailer and would go to the beach for a week. It stayed frozen for the day's drive and we would plug in time we arrived. I actually had my two sons lift it out of the truck and we put it on boards under the awning. This was one of the smaller chest freezers, about 24x36. Where we always beach camped was at Hunting Island or out at St. Joseph's Peninsula, both were long hauls to the grocery store. Having the freezer meant we could take a week's worth of food for all meals, keep ice cream, bagged ice and could also freeze containers to put in the cooler for the day on the beach.
We usually drove 350 miles maximum starting at 700am and off the road before 400pm, so it stayed cold even in June. We did have several frozen milk jugs of water inside to help hold the cold, you could also drop in a chunk if dry ice if you are where it is real hot.
We would run a cord under the trailer into the campground pedestal, giving the 30 amps to the trailer for a/c and the freezer fed from the 20 amp circuit.