I dry and wet camp about 50-50. In my old tt I had two trojan 6volt T125s batteries and a Xantrax 1200 watt inverter. In my new TT I have two Trojan t125s and a Xantrax Pure Sine Wave 2000 watt inverter.
My 6volt trojans on my old rig were 10 years old and still going strong when I sold it so it was a no brainer put two new ones on my new tt. I upped the inverter size so I can run an appliance or a tool if need be in an emergency. I couldn't do that before.
In both setups I isolated the tv circuits which also seem to string a long a couple of outlets. I disconnect that circuit from the shore power box and put a plug on the end. Then I run (its 15 amps) 14/2 romex to the converter and put plugs on the end. The inverter needs to be mounted as close the batteries as possible so its up in the front storage compartment. I plug in the romex and the tvs, plus a few outlets are now always on the inverter. I have installed a remote on/off switch which I use to turn it off when not in use. Keep in mind like toetoads stated you a have to adjust your use when off the grid as you only have some many amps until you recharge. Your fridge and hot water heater will run on propane, so minimal draw. We dont use the microwave or hairdryers when dry camping.
We watch satellite tv, dvds, charge our phones laptops etc and make coffee in the morning. Then start our genny and charge up. I will be further upgrading this year to solar.
Contact www.donrowe.com. They set me up with my inverters and help you trouble shoot. As far as batteries 6volt versus 12 volt search on the net you will see the difference. Ill never go back to 12volt deep cycle, been there done that they are just not as durable as golf cart batteries. Also google Trojan Batteries.
Pm me if you need more help.
Happy Trails