Hi Paul
Welcome aboard!
Don't worry, you won't notice a lot of difference in those 10 years. I have managed to get some very high resolution satellite photos of Tobago from NASA; one taken in 1990 and the other in 2000. I was prepared lower-resolution copies for the new myTobago site yesterday and had the two images up on two adjacent large computer screens. It was fascinating trying to spot the differences between the two. There was surprisingly little evidence of increased building etc.
OK, to your requirements. Sadly our new diving article will not be available before you go. However, forget about the sites - the dive operator you finally choose will discuss these with you and take you to those most suited to your capabilities, experience and current weather conditions.
Choice of a dive operator. Firstly, I have to say that I personally would run a mile from the dive operations at the Rex Turtle Beach. In fact, I would not use any dive operations based along the Caribbean coast. An experienced diver would know what to look for, but as a novice, it is essential that you choose a professional dive operation.
So, accept that a 20-30 minute drive to the dive operation might be the order of the day and plump for one of the better outfits. Names to consider (in alphabetical order) are as follows. They are all around the same distance from the RTB and some of them will arrange to collect/return you.
Extra Divers at Pigeon Point Road, R & Sea Divers at Pigeon Point, Undersea Tobago at the Coco Reef Resort, and Wordl of Watersports at the Hilton Hotel (Tobago Plantations in Lowland).
Websites for these operators are as follows:
http://www.rseadivers.com
http://www.underseatobago.com
http://www.worldofwatersports.com