I rode last night and tried a few things...they seem to help...I went back to my one bottle of sport drink and one bottle of water format...

I start drinking water at about 2 in the afternoon (ride was at 6:30). My body told me I was full a few times....lol

I stopped for a refill once....so 4 bottles in 30 miles 3 water and one of sports drink. I think I will take some Electrolite tabs with me on my Century tomorrow. It is a supported ride but they will probably have Gatorade...I like it once but not all day....