Originally Posted by rbleau6885
I wouldn't touch the tow haul 2900 pounds plus your gear is a walk in the park for that truck.
Tow haul just holds the gear longer to use revs and make less heat in the tranny. Depending on where you are towing (mountains?) It may be a good idea to keep it on. Especially if the 1500 has no tranny cooler.
Also, the hardest part of towing is the wind drag at highway speed. Weight has little to do with it in flat conditions and the frontal area of a 2900lbs trailer may still be 8' x 10', so lots of drag.
Either way, I would leave the O/D off.
On the battery question, I think it depends on how much you use it. If every few weeks, no point in leaving it plugged in or keeping the fridge on.
If it's going to sit a month, just disconnect the battery.
Make sure you leave the fridge open to dry, so as to avoid mold.