Newbie's Question

As far as keeping your RV plugged in until you get the slides extended, that is exactly what I do. My cord is long enough that I can park and level the FW, lift it off the hitch and then pull forward far enough to level the FW and put out the slides before unhooking the power. I do this to conserve the battery power for when we are parked and enjoying the FW. Why drain any more power from the batteries than necessary if you can do it. I also keep the truck running and have never worried about whether the batteries in the truck will help with the FW or not. Don't know about the disconnect, I have one, but have never used it as we usually keep the FW plugged in to a 30 amp outlet here at the house when not camping.