http://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5431469.pdfhttps://fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5427279.pdfhttp://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5190638.pdfThe Motor Vehicle Use Maps in conjunction with the Dispersed Camping Guidelines will help one find boondocking spots in the Grand Mesa Uncompahgre and Gunnison National Forest. See the notes on Dispersed Camping on the MVUM.
Lake Irwin had all kinds of rigs in it when I was there, and I don't remember getting there was much of a problem with steep grades or tight switchbacks even on 730. And coming out 12 from Crested Butte to Lake Irwin should not be a problem for a 2WD truck pulling a 24 foot toy hauler.
