I am very familiar with jon boats as I have a 10', just sold a 16' and fish quite a bit with a buddy in his 12'. My 10' is mainly for the ponds here on my property and are only good for one (1) person. The 12' we use in a larger watershed holding lake and it is OK for the two of us both 220# plus for a half day or so. The 16' (all open with two swivel seats) was great for 2 on the bigger bays we fish on Kentucky Lake. I think the 12' might work for the two of you but will be snug for when you try to fish three at a time. While the 12' will work most of the time, the 15' will work all the time albeit being a little harder to handle in the very small waters.