We have an inverter/charger on out 5er. All the electrical - except the water heater and AC's are run off it. I have power for (almost) everything all the time (off the batteries). I find a 2000 watt generator works well for charging the batteries...
I have the trail air with tri glide on mine. Even with a heavy pin, I can still see it bobbing and weaving out the back window. I got mine to cushion the trailer frame (there were more weld cracking issues back then).
Legal issues aside, get a hitch rated for at or above the max your truck is rated for. A 2200 lb boat on the back won't have more then 200-300 lbs on the back of the RV, (make sure the RV can do that). It will transfer 100-200 lbs off the 5er hitch...
And make sure you flag the wires as 12 volt only - so the next guy doesn't set something on fire by putting them back into the 120 volt breaker.Ac wiring black is hot, white is neutral (ground). DC wiring black is ground red is hot (+12). In this c...