Hi Dave,
I bought the book before we went down there, for the most part there is no classroom work. Read the appropriate chapters (the dives that you're going to do, check with the dive shop as to which ones they can do), then answer the review questions at the end of each section (they'll collect those pages from you at the end). Each dive has 3 parts, a "pre-dive" briefing, where you go over the objectives of the dive, then the actual dive, and then a post dive briefing to discuss the dive, and make sure that all of the concepts are clear. Other than that, the only class work is to read the chapters. Shore entry wasn't too bad, we were in the water before the big waves really started up, and once you're about 10' out it doesn't really bother you . current can be a bit of a brute when you're doing a surface swim to the dive sites.
I got two boat dives in, the wreck dive, and the deep dive, the rest were shore entry. Nice thing about diving there is that most of the dive sites are shore entry.
Not really sure how the beach compares to the reef, but yes, there were bugs in our room at the reef.