It's' my personal belief that a bunk heater is the best bang for the buck for getting heat in the winter so let's not revisit that debate.
My questions are about summer.
1. How well will they work in a northeast summer providing AC?
2. How much fuel do they burn.
3. Will the truck engine need to run in order to generate enough power to tun the AC?
4. How much will one cost if I get it with AC?
I don't think I would use AC 30 nights a year x 10 hours a pop. That's approx 300 gallons. That's about $900/year in idling for AC less whatever the APU burns.