If you hook up to line power in southern Mexico and Yucatan, it is probably a good idea to:
1. Use surge protector since we have burned out micro-waves in Baja and Yucatan
2. Better, have a 1.5 kW battery charger and run all 110 V through battery and inverter.
There are only two RV spots in Belize that we know of. One is near Corazol and on the ocean. This is only half an hour or so from border. The other is Inglewood near San Ignacio. It is about two hours to Tikal from there on decent roads (about 20 km are not so decent). The border crossing should not be a problem but you cannot get insurance at the border. Need to get it before you go into Guatemala. You cannot drive into Belize without insurance, just like Mexico.
Inglewood is excellent with a water point and good 30 amp (110 V) power. Birding caravans spend several weeks there since there are excellent sites within a few hours. The owner is great.
Reed and Elaine