Also pays to put all the places that catch your eye together that time of year. After you have a group look at the snow pack at each the deeper the snow pack the longer runoff is going to take to level off. I love southern Colorado the week after Fourth of July crowds die down and with a little leg work you can find fantastic fishing somewhere. When I take off that way I try and hit a river or lake every day. We camp so we fish till the evening cook pack up and drive to the next spot and set up. The itenerary is always flexible hit a day and it's lights out May be there a few days. I have had some great circles of the Rockies doing this. Just don't forget to take some pictures to share and enjoy the amazing surroundings. Like golfer Jeff said if the big rivers are blown out use your legs and hit the tribs often a short hike you will find solitude and often fish way bigger than the water they are in. There are some fantastic cutthroat streams that have been rotenoned to eradicate non natives (rainbows and browns) you find pure cutts most are not big but never high flows and they are very willing to bite. Always great to catch the native fish. I'm sure more will chime in but my .02 is you can't go wrong just have a good time.