My thoughts on your questions:<br><br>1. It's a place to start, anyway. If you gain a significant amount of elevation you probably should have a little more than that. In my climate I would not be comfortable planning those clothes... yours is vastly different than mine. Spend some hours outdoors if/when you get some nasty weather and see if what you intend works OK for you.<br><br>2. Carry is not the same as consume. It's a very serious question you're asking... that should be part of your "evacuation plans" - how are you going to re-supply water? At the weight of water - roughly 8 pounds a gallon - I would try to avoid carrying more than a gallon/4 quarts/4 liters. But it's going to depend on a lot of variables. Having done both, I'd rather go hungry for a week than thirsty for a day... you may very well find that drinking a gallon is something less than you might need for optimum health and performance. But with care you can probably spin out a gallon for a couple of days without too much danger, although you won't be feeling fantastic. I for sure would not start out with less than 2 quarts/liters.<br><br>3. Calories? What calories? See MiniMe's comments... Doug has a nutrition link on ETS - a good place to start. Since water may be the long pole in your tent, try to avoid diuretic effects in your diet. Some foods require more water to digest. However... I don't think it's prudent to launch out into the unknown without SOME nourishment stowed away. My paradigm is to have about 3,600 calories in reserve - that's "just in case" rations. YMMV. It would not hurt me to go a week with no food... but two weeks would be bad for me.<br><br>If your cotton T-shirt is your only shirt (vs the fleece whatever), then no, I don't think that is very prudent. You should at least have a lightweight long sleeved shirt (generously cut - loose) for a number of reasons. If your t-shirt is part of your undergarments, sure <shrug> cotton has many advantages over most anything but silk in the heat. Cover your arms up and I think your cotton undergarments will be OK. Note that I am answering your question, not stating what is ideal. Personally, I abhore pure cotton in the field.<br><br>Hope this helps,<br><br>Tom