I will be visiting Denali National Park with my family in August by RV.
I booked 3 nights at Teklanika Campground inside the park and the shuttle bus.
I have recently read that private vehicles are allowed to drive into the park on first day and out on the last day.
I have also read that you can change/cancel your reservation up to 7 days prior arrival.
So I am wondering what would happen if something unexpected (road accident, engine problem ...) prevents us to reach the park on the first booked day.
Am I going to lose everything? May I get in one day later?
How is the private vehicles traffic checked inside the park? Are there rangers at the campgrounds?
Many thanks for any help you can give me!