I parked at the Ammonoosuc Ravine trailhead parking lot because I was hiking up Mount Washington via Jewell Trail and Gulfside Trail. Refer to my review on Mount Washington regarding this trails. I had called Park headquarters ahead of time to see if they took my access pass at that parking lot. They returned my call and assured me that they did and all I had to do was hanging in my rearview mirror. Which I did. However, when I came back from my hike I had a pink ticket type thing on my windshield telling me I had to pay $5 or I would be fined $60 for non-payment. I wrote all over that envelope that I had an access pass and I didn't have to pay, and I wrote my access pass number on it and put it in the Dropbox. I did keep the stub and the next day I called Park headquarters again to let them know what happened and they said not to worry about it, that by putting my number on the pink envelope it would take care of it. But I don't like to run into surprises down the road so I gave the gentleman on the other end of the phone the number that was on the stub just in case there was a problem. The people at the park service were very friendly on the phone and he assured me that I do not have to fill out an envelope in the future, that sometimes they just don't see the tags hanging from the rear view mirrors and put these pink envelopes on cars. I was gone a long time, about 14 hours, and I felt safe leaving my car there. Also, there are pit toilets at that parking lot which come in handy before and after a hike.