https://www.blm.gov/sites/blm.gov/files/documents/files/PublicRoom_Alaska_2015-Denali-Hwy-Brochure.pdf
Camping: Permits are not required for noncommercial camping on BLM-administered public lands. All camping is limited to 14 days within a 60-day period. BLM campgrounds fill on a first-come, first-served basis.
The Denali Highway is often overlooked by motorists, yet offers some of the most spectacular scenery and recreation opportunities in Alaska. For those with a heart for adventure and a little extra time, the highway presents a historic glimpse of the Last Frontier – wilderness in all directions. An abundance of camping, fishing, wildlife viewing and hiking opportunities can be yours with planning. The Denali Highway is 135 miles long and connects Paxson on the Richardson Highway with Cantwell Junction on the Parks Highway. A loop trip from Fairbanks is 436 miles and a loop trip from Anchorage is about 600 miles. Gas is available at Cantwell. There is no gas at Paxson. Allow several days for these trips.