Buff, this is just rumor but from what I have heard, Divi was on the way down but they got a new manager a couple of years back and he has done great job of restoring the place. I have not heard any bad reports in a long while and believe me, the guys on the Bonaire board are as hard core about Bonaire as this one is about diving. As for taking tanks off site, sure you can. I have done the Hooker several times, it's a nice dive. If you look just off shore, you will see 2 (maybe 3) bouys that mark the bow and stern of the ship. I just take a compass heading right between them and head out. The reef will slowly taper down to about 30 ft at which point it will drop at about a 45 deg angle to 100 ft. Once you get to this drop, look ahead, you can see the wreck. I usally do a free water crossing to the side of the ship at about 60 ft and then work my way down one side, loop the ship and then back up the other side.
Mike, the distance between where you park your truck and the water varies somewhat say from 100 ft to 25 ft but I can get as close as 4 feet at some places (Thousand steps IS as exception).You can do boat dives if you want but I like the freedom of shore diving, mainly the lack of crowds and no time schedule. As to the question of Bonaire vs Cozumel, well guess it depends on what you want. I like the quitness of Bonaire. If you are looking for lots of shops, people and night life then go the Cozumel, if you want lots of quite evenings with all the diving you can stand, friendly locals and good food then Bonaire. The max distance is maybe 8 miles to a dive sire and some great sites are less than 2 miles and don't forget, most of the hotels (Divi, Sand Dollar, Buddy,Lions Dive just to name a few) are located on the water and you can dive off their docks as well. Thats where I usally do my night dives.