I'm guessing that since Sept. '09 was your first trip to Bonaire, that you don't have too many September experiences to draw onI love September there! Warm water and Ned DeLoach will be at Buddy's and it is a good place to be that time of year![]()

There's a reason why Ned DeLoach is there in September and it's not necessarily because he likes September best. Hopefully you're at least going for the coral spawning. Wind reversals can slam waves into the resort docks making hotel shore diving dicey at best. Lack of any wind means it stays hot even at night, uncomfortable for dining outside or indoors without a/c (which is the majority of dining options in Bonaire). And it's smack dab in the middle of hurricane season. Sure, Bonaire is out of the hurricane belt, but that doesn't mean complete freedom (see Hurricane Omar, Oct. 2008). Also, if you're connecting through Houston, hurricanes can cause the airport to close which is a big deal when there are only a few flights/week off the island (see Hurricane Ike, Sept. 2008).
Just me, but if I were leading a trip (presumably taking advantage of the freebies at least, if not actually on the margin between advertised and actual trip cost), I'd make sure I were going at a safe time of year to maximize the chance of the group's happiness, or else cover my butt by providing full disclosure of all the things that might go wrong during that particular time of the year. Good luck!