Sounds lovely 2 wheeler, it was like that today and I enjoyed my ride a lot more than I did previously.
Yeah I take a water bottle that is half frozen and half ice and a small camelback that is filled with ice water, this helps as long as I don't get too hot, otherwise I get sick to my stomach from the cold water xD.
Just finished my first 16 mile day with 50 lbs of cargo and my legs are jello, but it's a good feeling.. As long as I don't have to go anywhere today that is!
Any tips on riding with extra weight? I got a small rack on the back that holds small things (usually about 20 lbs max) the rest goes in an old backpack I wear (camelback fits inside a pocket on it).