in 2004 we rented from blue water. They brought the equipment to the dock per the reservation.
in 2008 we rented from usb. They were right at the charter dock.
get the books, most sites are heavly documented, but some books have the diagram of the site, which for several sites really helps. From a sailboat the more exposed bouys are harder. These are day bouys, and are not maintained as they should. So leaving someone on board is needed unless its truly totaly calm at the bouy as it generally at rhone.
The deepest sites will top out as 85. And bulk of the rest 60. Check the books.
order of best memorys
rhone, really is two tank so you dont rush it.
painted walls
Brewer bay east (underwater wall of bolders like "the baths" )
alices wonderland
chikuzen
as you surf there are many worthy others, but conditions vary at each so you have to be flexible. (crowded bouys or conditions)
Filling tanks, several locations in the islands i seem to remember many close at 4. So our pattern of filling at 330 and the moving the overnight spot worked good. We always rented 2 tanks each. The shops give you a rack for securing on the deck somewhere.
Do not fly with the "stuff", these shops have everything, however this is a personal decision. If you want to bring your mask computer and reg, thats works good too.
With no local experience it is engaging to plan and performs this.
This is one of the few places in the world where is combined the documented sites + bouys + reasonable distances + sailboat rental + dive quaility.