Luggage and bags: The smaller the better for ease in traveling.
Clothing/Shoes/Weather Gear: Teva's, tennis shoes, hiking boats, rain gear, nylon or easily dried clothes. Humidity is high and cotton takes days to dry. Mopan River Resort will do a large mesh bag of laundry the same day for US $10.--a real bargain.
Toiletries and Medical Supplies: REI Jungle Juice or DEET containing bug repellant. Not many mosquitoes at the Mopan Resort but there are in the jungle.