just bought a 98 wilderness 23 ft pull behind camper to stay in. live in southern Missouri winters do get cold here and nights here are already getting a little bit cool. on my parents property they have a septic tank and there is a clean out pipe sticking out of the ground about where id like to park my camper. can I use the cleanout for a dump station? I'm new to campers and there are 2 grill size propane tanks on the front and wondering what my best option is for heating the camper this winter? and how long running the furnace those 2 tanks of propane would last me keeping the inside warm but not blazing hot just comfortable. give me all your advice and tips I would very much appreciate it! thank you!