Do we sit still for long periods on the water? Just wondering because I get sea sick unless we stay moving.

Its a wide boat. It doesnt rock back and forth. It goes at a slow steady pace. No stop and go. You will be fine. Get there a hour early if u want a good seat up top by the bar. U will have to stand in line for a hour but u will have a good table

No, once the tour starts, you don't stop until your return.

No

I also get sick but was fine on this.

Only stops for sunset

No it is almost constantly moving