That shit sucks, especially at NTC. I've never been to JRTC, but I bet it would suck there too.
When I was at George AFB, just down the road from NTC, they would have exercises every 3 months. In the summer dozens of F-4s, huffers, trucks, etc out on the flight line and everyone in MOPP 4. They’d stay in in it until the ground personnel would start passing out. Yeah, it sucked.