Just got back and here are a few general tips that I would have appreciated knowing beforehand: Take American cash, and plenty of it. Everyone accepts USD, and there are not many ATMs. The rate is 2 Belize $ per USD. Many places don't accept credit cards.
Everything is very expensive! If you're staying in one place for a few days, bring ground coffee from home. Also, bring snacks such as tuna, etc. Chips and dips are prohibitively expensive, but local specialities are reasonable, such as tortillas and the local cheeses made by the Mennonites.
If travelling from the border to Flores for purposes of seeing Tikal, DON'T accept the taxi fees proposed by the swarms at the border. Instead, either walk the 100 meters to the center of town and take a "collectivo" (you can't miss it) for about $10.00, or propose $30.00 - $40.00 for a taxi ride all the way. Believe me, the touts WILL accept this price.
If taking a day trip to Tikal from Flores, DON'T buy from a guy named Enrique who works for SAN JUAN TOURS. He adds on an extra 50 Qzl for himself, and doesn't inform those who are going for the sunrise tour that there is an extra 100 Qzl fee! This has caused many people to miss the park. Buy your day excursion by going into one of the many tourist offices in Flores.
