Really, When I was planning my 1st trip, I thought that AC had so much more than CC. The flight has to be the same. So it comes down to the rest. The rooms/hotels ran from $30/ night to as much as you want to spend. I found a great place and returned their the second time. Check out this link. There is a message board. You will feel like you know everything about the place before you go.. Ambergris Caye Island Information, Belize
You could share a guide if you found someone. I don't think the guide would set that up. I found a freind where I was staying. But for $125, I went on 4 half day trips one year. I still have their busines cards. Hotel's have them all also.