I’ve been there, it’s a great museum. There’s an SR-71 there for one thing.

That's pretty much all of Arizona from late April through October.

Depends. Taking pictures in front of or around the planes is no problem, but majority are pretty much sealed off. That said, most of the bigger aerospace museums have several planes and helicopters with cockpit and cabin access.

Also if you’re talking specifically about the planes in the boneyards, would not recommend doing that in the desert. You will find some other “visitors” like rattlesnakes, scorpions etc. that have made the plane their habitat.

https://www.holloman.af.mil/News/Features/Display/Article/31...

According to the site, many airplane boneyards are limited access sites and do not provide tours. You can always call or email them and ask though.