You might be most comfortable in it if you don't

eat much during the day and you don't exert yourself too much. It also might be really nice if you could be in your swim trunks, wherever you guys go, and are able to get into water periodically. Take your girls and get near a body of water for the day. Put on your tanning oil, if your skin needs it. And you can even take a beach ball wherever you guys go, and hit it back and forth to each other. If you go to a park, look for one that has a pool, and/or water fountain (the kind of water fountain that's designed to put your whole body under).

Water, Sancho. Water is the key for tomorrow. Get near water, and you'll be just fine. And if for some reason you don't like to take your shirt off, you can still wear a shirt made of a breathable material (such as polyester, which also doesn't stay wet long) and then periodically pop into, or under, water. Or if you can't be near water, then, from time to time, just dump a jug of water over your head (I'm sure that will amuse the girls, too. They might even want to do the same). Make sure to drink lots of water too. And remember, don't eat too much. And don't take in too much sugar either (that includes the sugar in fruit you may eat - Don't eat too much fruit).

Okay, Doctor know-all will shut up now.

Anyways, Do have a wonderful time, Sancho. And get near water!