Recently retired my 20' 70hp dual 'toon.
I've gone across the broads on a Saturday with 1 - 2 foot whitecaps, not fun, very tiring. Doable but not recommended.
Have folks sit to rear, trim nose up so you are not trying to be a torpedo. Best to stay closer to the side of the lake and not out in the middle.
Keep the speed up faster around what the waves are moving at. Too slow and you will nose dive into a trough. Too fast and you drive your colon into your kidneys.
First-year I had my 20' I did not know this, on a Saturday afternoon in Medideth Bay not far out from the Wears I slowed down to let a big Caver go past my bow, and the trough was so bad, I blew out my port side panel and had water dripping off the entire inside of my bimini. I probably took at least 6 inches of solid water over my front seats.
