Originally Posted by Drskullz
So if I run a Anderson plug to the back of the jeep and and wire the other end up to the battery would that cause any problems with my jeep battery. I also would install a 30 amp fuse near the jeep battery.
It should not - I've done similar setups in the past. You may use an Anderson SB50 with 8AWG or 6AWG wire for safety, a "local ground" at the plug (so you only have to run one lead,) and fuse for about half of the alternator's max output rating (it's possible you can run more than 30A to the trailer!)
I would be highly inclined to run either an isolator or a solenoid to control power to the SB50 to the trailer, unless you're sure
you will remember to always
disconnect the trailer when you've shut down the engine.
(A 7-way will only be good for something like 20A. Andersons can typically be "surged" for twice their rating, will sustain a higher max rating anyhow, and are easier to install than wiring up a 7-way barrel plug.)