I spent 30 days on Guam while in the Marines and I will say this, make sure you have a bag at the ready. When they call for an evacuation due to typhoon coming in they mean, evacuate. We got hit twice while I was there. But the land is beautiful, if you get the chance try out the skin diving tours at Fisheye Marine park. Also when you go in to Won Bat it is a blast, the first thing you say is, where the hell are we landing this plane??
The humidity is horrendous but the weather is beautiful year round. I loved the southern area around Coco's Lagoon, if i remember that's what it was called. You will enjoy your stay there and make sure you take in the local scenery. Have fun sir.
LawnDart