Look forward to seeing you, Moose. If you want to do an atoll trip (Lighthouse for Blue Hole or Turneffe for Elbow) do it from Caye Caulker, as it's quicker and cheaper. I'd go to Belize Diving Services - professional and friendly.
Lots of interesting inland tours. I've never been cave tubing though most people say it's a lot of fun, but for ruins I'd certainly pick Lamanai. If you have time to stay on the mainland (you won't this trip) you should stay in San Ignacio and visit Xununtunich and Cahal Pech, both local. And check out Actun Tunichil Muknal (wet cave with a Mayan sacrificial site) - the most wonderful experience I've yet had in Belize.
Lots of interesting inland tours. I've never been cave tubing though most people say it's a lot of fun, but for ruins I'd certainly pick Lamanai. If you have time to stay on the mainland (you won't this trip) you should stay in San Ignacio and visit Xununtunich and Cahal Pech, both local. And check out Actun Tunichil Muknal (wet cave with a Mayan sacrificial site) - the most wonderful experience I've yet had in Belize.