Are you shopping when you get there at all? If so, one of our favorites, rotisserie chicken from (Publix, Winn Dixie or Costco)
1st meal - Dinner with steamed veggies and/or roasted frozen or fresh potatoes (are you in a 1 bd with a stove ?, if not ready mashed or ready rice) and add a tossed salad. Crusty bread.
2nd meal-possibly lunch and/or dinner, add left over cold chicken to romaine greens, croutons, shaved parm and toss with your fave Caesar dressing.
I've traveled with 6 hungry teenagers, so when there's 11 of us I bring the crock pot.
My favorite tomato sauce, frozen meatballs, boil some pasta, add a salad, garlic bread, done.
Take a pot-roast, stick in the crock-pot with beef broth, onions and a jar of peperoncini peppers, add nice sub rolls and cheese for really good French dip sandwiches.
Every resort has grills, marinate London broil in your favorite vinaigrette while at the parks, grill it with some asparagus, green/red peppers, Bermuda onions. Eat it as is or make fajitas if you marinate in Mexican spice.