HELP! Needed to know this yesterday

Not sure how big your camper is. But our pop-up the furnace did not work in it. We bought a heater that propane hooks up too. I believe it was made by Coleman. It was maybe like $40.00. It took one of the little green cylinder bottles of propane(like for a cook stove. The bottle just screwed in the back of the heater. Was the size of a large burner on a stove. We just sat it on our countertop in the pop-up. We also took it along last year on a tenting weekend in April. I live in PA so dropped down to like 36 degrees that weekend. IT took the edge off but still needed the fire in the morning to warm up. We are also planning a Halloween trip at a state park next mnth. Thinking about the cold nights also. But so looking forward to handing out candy to about 1000 kids per night and decrating our site.