Hi
I have a 18 foot pontoon boat w/25hp that I use on occasionally on the lake.
You have to balanced the load when a rather large wake/wave approaches and find the right angle of a attack. Worse case.... you get a deck wash, pontoon boats (atleast mine) will not sink.
I love my pontoon boat! It's very comfortable and roomy.I have had several other boats on the lake up to a 33 footer.
General rule.... stay away from the Weirs on the weekends!
Jeff