Camper and RV owners-please help a new owner!

I just purchased a 21 year old 5th wheel to perm park at my little camp spot. First project is going to be resealing the roof. The previous ower had a leak. Its fixed now but he used black goopy roof tar or whatever on the seams.

#1: Should I just use that stuff on the whole thing or should I go with the good stuff from Menards thats made specifically for EPDM roofing. The next question is should I keep doing the tar stuff on the seams or will the Menards stuff bond to the tar?

#2: How much propane will the fridge use in a day?

#3: Please explain the winterizing process

#4: If I replace the crappy built in tapedeck radio with an actual car unit, how much more battery power is it going to draw?

#5. I see people with nicer units have an indoor battery meter. How much are they and how hard to hook up?

Any other info a newbie could use will be much appreciated!

Its too bad he didn't repair the roof with proper materials.

like these- http://www.rvpartscountry.com/RvRubberRoofProducts

http://www.eternabond.com/?click=4814

#1 Use the stuff for a rubber roof.

#2 You can go for a long time on a 30# tank. Depends on how much you open the door. It's kinda like a radiant stove, as it doesn't move any air, and the quicker you are out of it, the better it will work. It took a long time for me to get that thru to my wife. A small fan for that purpose can be bought from an RV store, like Camping World, and helps a lot. It will run for weeks on 2 D batteries.

#3 I'll add that I have a bypass for the water heater, and I fill the lines with antifreeze. Takes about 1.5 gallons for me.

#4 I don't think I've ever turned my radio on, except when I bought it.

#5 Pick one up at Camping World with the fridge fan. Pretty simple.

I'm sure there is a Camping World around Indy? It's not inexpensive, but it's a good, one stop shop for that kind of stuff. Or Amazon.

My last unit had a flat roof. I had some trouble with the roof leaking around the a/c. Turned out that I just had to tighten the thing up, but the interim solution was to crank it up 3-4" high in the front. It actually didn't leak any more for the rest of the trip, and it became a standard practice for me to leave it a bit high in the front. Also helped condensate from the a/c run off the back and away from the door. Your supposed to keep it as level as possible for the gas absorption refrigerator, but it wasn't enough to cause a problem. The new one has a radius roof, so now I park it level again.

for #5:

http://www.amazon.com/gp/product/B0027NRBUA/ref=oh_details_o00_s00_i00

techies would want volts and amps, the above will get the job done.

Petroleum is bad mojo for a rubber roof but at 21 years it is not likely to matter much as these things just don't last that long.