I have already started a thread about which trolling motor would be best for me but, now I have a new question.

We have a 22 ft pontoon boat and a 16 ft flat bottom. I am going to get a Terrova with I-pilot to put on my 16 ft Jon but, I have a slight problem. I already have a 70# Minn Kota Maxxum on my jon and it flat just is TO much trolling motor. I have problems getting my trolling speeds down to where I like them. I was going to take the Maxxum off and just put it on the pontoon and leave it and put a 55# Terrova with I-Pilot on the Jon BUT, the only time we will be fishing from the pontoon is when we are fishing as a family (3 kids and 2 adults) so I move around alot unhooking fish, fixing tangles.... you can imagine. The I-pilot would be a BIG help on the pontoon but, I don't really want an 80# trust trolling motor on my jon. I would like to get a quick mount for both boats and just use 1 trolling motor. BUT, would a 55# trust be to small for trolling with on 22 ft pontoon? I know I would most likely drain the battery so I was thinking of just having 2 batteries for it but, what about pulling us around or be really hard to control in a breeze. I WILL NOT fish from the pontoon now in much more than a breeze unless we are anchored. Thanks for any help. Fishorhunt