S1957 - WZTJ's trip report (separate thread) gives an accurate picture of what to expect. The advice I got & used = adjust your minset/expectations away from prior charters ie; BVI. then replace with an adventurer's & self sufficient mindset.
Once You leave Placencia, your yacht & crew will be the primary source of support & entertainment. The natural beauty is amazing. The cayes are very small, anchorages more exposed than you will expect and with only a couple of exceptions (like Ranguana - where custodian family does cook pre-arranged meals) there are no beach bars, restaurants, stores etc that are available in other places. There are a few spots with a few mooring balls (the heaviest @ Ranguana) but most of the time we were on double bow anchors
We (3 cats) did head back to Placencia toward the end of our charter because one boat drank all their alcohol, pick up more water & swap out a dinghy
Ranguana is my favorite spot because of the whole setting with beach, snorkeling, fishing, relaxing plus delicious local cooking available.....nice layover spot. The southern cayes (hunting - lime) are also unique because of their position to the reef.
I used a combination of cruising guide with it's charts
with a real chart of the area plus my gps
(general stuff) & depthfinder. ............agree w/N = eyes are key around Queen caye & down south. Very memorable experience.