Dean,
Yes we made it there yesterday and dove for around an hour an a half with 650 psi left and plenty to see! High tide was 5:11 pm and my dive computer shows us starting the dive at 4:38 and exiting the water at 6:09. Eveyone i talked to recomended going on slack tide as it would probably give us the best experience for our first dive there so i recommend you try doing the same. We started on the south/east side of the bridge and went straight out to the sunk boat, looked around for a little while saw lobsters, octopus, baracuda, and tons of more fish. From there we headed beack to the bridge and pilings and dove there for a while taking pictures with my GoPro of everything i could see. The park and facilities were very nice and we meet some other divers while exiting and talked for about 30 mintues and had a good time. For a free place to dive, park, shower and meet good people i would recommend to anyone to take the chance to go check out BHB for a relaxing exciting dive!