Getting tourist board information right before and even during your vacation in Tumon, Guam can really help you benefit from the most up-to-date details about the region you are visiting. Perhaps there is a festival occurring that is new on the calendar that a tourist board can help you with. Traveling to this region also brings up important health concerns and it is best to check with updates prior to planning your trip.

You may wish to start off generally by visiting an online tourist board  that represents all of Guam which is loaded with information, try  Visit Guam or their online Chamber of Commerce. Tumon does not have its own tourist board online so you must visit the section dedicated to it on Guam's tourist website, click here to be connected. 

Checking with your own government or the host country's embassy is always a good idea before traveling to make sure you meet all of entry requirements. Guam is officially an unincorporated territory of the United States, but this does not mean entry is simple; passports and customs must still be cleared. The U.S. government provides a list of requirements online. You can also visit their Consular Sheet on the Federated States of Micronesia for all their information on Americans traveling to the country.