Here's my Collegiate west Caltopo link. On PC's/laptops/etc, there is no caltopo app, as far as I know, just go to caltopo.com, you work right on their website. You can link caltopo to an email address, like a gmail account, and therefore save your work. Or you can export GPX files (and import them).
https://caltopo.com/m/P4GB
I've stayed at the Twin Lakes lodge a couple times, cute place about $100/night, probably more on weekends. IIRC, there is a hostel in Twin Lakes as well, never checked it out. Glenwood Springs has reasonable accommodations, if you're approaching Aspen from that direction. Aspen, of course, is ridiculously expensive. I've stayed at the "Difficult" campground right outside of Aspen, doesn't seem to fill up, and you can reserve spots there online. All the other actual public (national forest, etc) campgrounds near aspen always fill up in the summer. There are plenty of places to "disperse camp" right off the highway along CO82 between Twin lakes and Indy pass. There's also a hostel in Leadville, maybe 20 minutes from Twin Lakes.