I have the opportunity to pick up a new Minnkota trolling motor which will be used on a john boat with me (215lbs) and two boys (total of 240lbs). Would a 30 lb thrust work? Should I go larger with say a 40 or 45 or 50lb thrust? We will be using it a local county lake for long line trolling some but mostly going from spot to spot and anchoring.

Thanks