I don't like the heads on the prowler way to easy to get tossed overboard
6-8 your kinda too big for a 6pack but too small for the bigger boats. So you might have to join a few others on the bigger boats. The condor, eclipse, islander, vagabond, fortune..........there's a bunch of good ones but these I've been on and would go again.
Your best bet is go midweek if you can otherwise it's going to be crowded. 1.5 trip will give you a full day of fishing and two nights on the boat.