Start planning, you'll have no problem finding sites. Most of the pull offs are spacious and at most overnight parking is allowed unless otherwise posted. Many of the campgrounds are just big marked off parking lots.
Roads vary year to year, on out trip last year I was concerned due to much I had read about frost heaves but the truth is they're not as bad as some folks report. I think those reports are from Floridians that never left the south till they headed to Alaska. The speed limits are appropriate for the road conditions and most of the frost heaves are marked with flags or cones and for annual reoccurring ones signage. You really don't want to speed, there is so much to see sometimes it's right on the road in front of you. Have the navigator keep the camera ready.
We are planning on a return trip in 18.