Good overall rod for trout fishing is 5wt 9'.
No,i didn't mean how much gear you bring. That's up to your prefference.
But you mentioned where you want to go and that was a lot of miles. Mountainous Colorado is tricky, you look on a map it seems really close, but when you start driving those passes it takes time. Besides when you are going from A to B you likely to miss fun stuff in between. I guess I was projecting. Being an avid photographer I like to stop and pause, and look and inhale the beauty. Unfortunately legalization of pot in CO brought different meaning to high. Mountains make you feel high in pure context.
There is nice flyshop in Arvada, Charlie Craven is well known. I use his fly tying book a lot. That pretty much use for my X. Get me to cool streams. Right now we exploring WY fishing.