TV for recharging battery while dry camping

We are off to Yellowstone in May, no electricity for 6 days. I did a search - 4 gauge copper wire works fine to jump from the tv.

When we were in Glacier, 2012, we dry camped for 8 days - mid September. It wasn't until day 5 when we had to change batteries (we have 2 deep cell 12 v marine batteries.  About halfway into the fifth day I had to go outside and change batteries as the monitor showed I was down to 1/3 charge.  And this was using the furnace a  lot during the night at temps would normally be 36 to 45 at night.  We turned it off during the day as we would be hiking throughout the day.  Would use the furnace from about 4 pm till 8 am the next day.  Had l.e.d's throughout so that helped our battery life as well. You can read other posts about the advantages of 2 deep cycle 6 v golf cart batteries that will last even longer.  If you haven't purchased yet you may wish to go that route.  I am beginning my 6th year with my 12 v batteries, still going strong.  But when they wear out, and they will, I will seriously consider the 6 v route.

Yeah.. I didn't think they even made jumper cables that light.

JEEZ looking on Amazon, I see 10g cables.. that's a max 30A current.. do people not know how many amps an alternator can put out under load??

8 gauge? I wouldn't call them jumper cables. More like clip leads.......

I have camped at alot of national parks and all considered running a vehicle to charge trailers battery as a generator. Must adhere to generator rules of the park. One year at Shendoah national park (loft mountain campground) a guy in a van with a bad exhaust manifold ran the van late in PM to charge batteries. He was told by park ranger one time to stop and second time to leave.Almost all the campers in the area started clapping.l also clapped. Peace & quite around the campfire again. Many parks are also limiting types of generator use because construction type generators are too loud. I have a Honda 2000 and run it sparingly. I don't want to hear it either even though it's relatively quiet for a generator.