Frankly HTCL, I think you're in a good place, and using your own eyes to form your own opinions. You don't need to pick a favorite LDS right now, and if you found a couple masks in the basement that fit will you don't even need those. If not, spend a Saturday revisiting local shops, deal with the interesting cast of characters that staff dive shops, and focus on finding a well-fitting dive mask. Make sure you stop back here after your trip in May and let us know how it went, and you'll have a whole bunch of new questions to ask. If you have full-foot fins that fit you, take those on your trip. If you have scuba booties and want to bring back strap fins instead, half the dive boat will be wearing scubapro go and apeks rk3 fins, you won't stick out. They'll likely want you to dive with a snorkel for reasons that still elude me, so bring them too.