On travel days, we find a reststop or similar, and make sandwiches in the back (our old TT or the C). And as mentioned by the OP, the $5 rotisserie chickens are great...we de-bone before hand and have the chicken in a container that fits our fridge. Sometimes we can microwave the chicken, add some BBQ, and make a quick BBQ chicken sandwich. Awesome.
And as mentioned, 1st nite after a long travel day we rarely cook big. Usually, we will fry up hamburger, add taco seasoning, and do spoon tacos using Frito's. Takes like 10-15 mins and is fun.