BradMM - OF does a 3 tank dive on Wednesdays. We stayed at Coconut Bay and did an east end three-tank with them to make the drive worth our while. We were back at the dock around 2:30 I think, so not a terribly long day. We planned to end at the site off their dock because you can usually catch a few sharks bee-boppin around after lunchtime (and we did!). I'm glad we did it because my favorite dive site to date is out on the east end. We plan to do another 3 tank with them next time we are on island.
As others said, you can pick whoever you want to dive with. Every op will pick you up to bring you to the boat and bring you back. If you do a package with Dive Tech (3 days or more of 2 tanks), it includes shore diving at Lighthouse Point, as well. We like Dive Tech and DNS the best. I've also dove with Ambassador and liked them, too, just not quite as much (mostly based on the boats). DNS is full valet and will rig up all your gear and swap out tanks for every dive. They also have cookies instead of orange slices. Dive Tech will help with gear, but doesn't do full valet. Both have great instructors in the water who will search for good macro stuff to see (my favorite!) and generally pick pretty great dive sites (i.e., skipping the boring ones). I think we had 6-9 per boat when we dove with both ops last time, but it was also during the high season. We had two days with Dive Tech with just the four people in our group, too, so you never know. DNS leaves the dock earlier than all the other boats so the upside is if you go with them, you get your pick of the sites and are back earlier to get more shore diving in or have more time in the afternoon for the beach or site seeing. Dive Tech goes to the north wall quite a bit when the weather cooperates, so you wouldn't need to head to the east end to do North Wall diving. I believe DNS has a larger boat than the one we were on that goes to the North Wall sometimes, too.
I haven't stayed at Sunshine Suites, but their on site restaurant is our favorite place to eat on the island. We do breakfast there twice every trip.
tkaelin - so glad to hear you're staying at Coconut Bay! I think we talked about that on a different thread before but I didn't realize you had booked. Enjoy Hepp's Pipeline. We are going more toward the summer months for our next trip so we can get more shore dives in off the property. We only had 2-3 days when the current would cooperate when we were there during the month of January, which is still great for that time of year, but we wanted more!