Before we go on a week or longer trip we always take a day and prepare some meals that we freeze and can pull out and heat up and be eating in 30 minutes or less. Things like maccaroni and cheese with meatballs or spaghetti and meatballs or goulash to stews and soups. The pre made meals are an easy thng to do. We package them in the small alumminum foil tins we pick up at the dollar store and they fit well in the RV freezer.
I give my wife a break and do most of the cooking when we travel. I use an induction cooktop with my cast iron and my grill and fix some great meals while we camp. I love my cast iron.