Back in the early 1990's during my UFO-nut days I drove up to Rachael, Nevada with the idea that I was going to hike up to the top of the closest ridge on public land next to Groom Lake before Clinton's Eminent Domain grab went through.
The joke was on me. That is one serious desert.
First problem the "Assault Force" will have is that they're being told to meet in Armagosa, which is over 40 miles from the base. Rachael and Alamo are the closest "towns" at around 20 miles. There are three access roads, all require 4 wheel drive, and can be easily cut off with a small force (or just concrete barricades). A good ATV comes in handy, but even so you're going to stand on basic IR cameras, and the security will be on you once they figure out you're not turning around. You can't come in from Armagosa because that will take you across the Nuclear Test Range, which is kind of on the radioactive side. Coming in from the south-east takes you across Nellis's practice ranges where they bomb and Brrrrt stuff. It's a bad idea to be an unacknowledged target out there.
Temps this time of year average in the upper 90's (F), and if anyone dies during this stunt it will be from the heat, or snakes, or both.
Okay, let's say you somehow reach the facilities, you can't access any of the buildings, so what's the point of being there? I mean I'm sure their bowling alley, cantina, and Del Taco are nice, but the ones in Vegas are better, and cheaper. And then you still have to sneak out all the way across that desert again.
Anyway, I ended my adventure by gassing up and heading back to Vegas where I won $600, and spent $200 of that on lap-dances. I think I made the smarter move.