My husband and I re remodeling the pup, its a 1987 jayco...we thought it was a refrigerator but its not, Question #1: How do you keep anything cold inside that, unsure if we should get a new fridge or just use coolers? Question #2: How often do you actually use the inside sink? It is so small, really cant do much in it? Am I really going to need the sink? How often do you actually use it[/u], I figured water bags...etc... but to actually use the sink, I dont know if we would ever use it?