You don't have to go all the way to Bremerton if you think it's too far, under the conditions. When I have guests on board, I often start out for a destination, but then change my plans and go to a closer or different destination, so my guests don't get seasick or too tired. If they have a good time, they'll want to go out with you again. If they get scared or sick, they won't.
You've given a lot of thought to this trip, and you have a good plan. You'll do fine. Have a great time, and lets us know how it went!