We were in Yosemite a couple of weeks ago and I always like to stop by the Ahwahnee. Kind of like a ritual.
We parked along Northside drive and walked there, to avoid dealing with the understaffed/slow valet, and paying the fee. Got to the back of the hotel and the whole area is fenced off. You cannot enter the hotel from the back. I am not sure how the cottage guests go in.
Just mentioning it in case you were thinking of staying there. I had actually considered it myself (it was a last minute trip and Ahwahnee was one of the only options showing up) but luckily a room at the Lodge opened up and we stayed there. I would not have been happy to pay $650 a night to find out the whole back area, which I love, is all closed off.