Well, I think at this point I'll not worry too much about it, but begin to check into what's available locally. I also want to talk to my doc about it. Today, I rode early and it stayed in the 60's and 70's so I don't think I was sweating much. At about 26 miles, I started getting a little cramp in my right hamstring, but realized I just wasn't drinking enough. I consciously drank more over the next 5 minutes and it went away. No electrolytes needed, just more water. By the time I finished up, a tad over 30, I was fine. Hot weather is on the way, though.