I was there July 1 to 3. I climbed Sunlight and Wisdom, both easy, fun 3rd class. I crossed a few snow fields with just trekking poles and never felt unsafe at all. I did use my ice ax to glasade, but that was it. Eulos (yo-les) had a much larger snow field, but two of the three people I talked to, climbed it without crampons. If they did have a hard freeze, you'd probably want them. I found the best campsites in the Chicago Basin were at or above 11k, so keep hiking on approach day.
We took the train in from Silverton, and I did see a hostel on one of the side streets there. Silverton was a lot prettier that Durango. Plenty of camping in Silverton too.
Let me know if you need more specifics?