Hi I'm interested in White Water Rafting down the colorado river, I'm curious on the best time of year to do this, I assume summer. Also what company provides the most economical means of doing this? I live in Michigan and would have to travel there first. I'm doing this by myself so I would like to be in a guided group tour situation. I would like to go through the Grand Canyon doing this but also more than just that. I'm a 31 year old guy also. Please any answers would be appreciated.