Looking ahead to summer / early fall, I'm looking to plan a trip to either the Sierra Nevada or Colorado (with any luck, both), with the intention of doing a multi-day backpacking trip bookended with a couple days of car-camping and shorter dayhikes. I was wondering if anyone has any favorite guidebooks for either area? For Colorado, I would be most interested in the San Juans as they are closest, by guidebooks for the whole state are fine as long as they are good. I'll also take specific hike recommendations here, although I don't have any real length/time constraints yet. Mainly I just like to get high up near or above treeline with some nice lakes and/or streams and great views. I wouldn't mind doing a walk-up or light scramble peak bag in the mix, but I can easily find info to do something like that on 14ers.com. I'm more concerned about finding some great high altitude backpacks in awesome places.