Get a FoodSaver
or similar product. Make sure it has a setting for moist foods. Cook whatever at home between now and when you leave. Seal and freeze. Sauces and such can be first frozen in a suitable size container, then popped out and vacuum sealed as usual. Put the bags for a given meal in refer to thaw two days before you want to consume the meal. Reheat unopened bags in simmering water and it will come out like it was just cooked. No fuss, no muss and no surprises.
When you take care to freeze the packages so they are flat, you can fit a surprising number of meals in even a six cubic foot RV refrigerator freezer.
Of course the meals for the first 6-7 days can just go in the RV refrigerator. Those for the first couple of days pre-thawed at home and those for days 3-7 thawing in the RV refer while you travel. Start transferring the still frozen meals from the freezer as needed.
I do the above with good success when I know we will be traveling from campground to campground and don't want to be bothered with having to stop for food and cooking.