Lpt: a circular saw is quicker than a sawzall on 2in aluminum pipes. If you aren't sure what kind of metal you're working with, use a magnet. If it sticks, use a sawzall. If it doesn't, use a circular saw. With a little practice, you can get through a 2in pipe in under 45 seconds (12s is my record for 2in aluminum pipe)

How you use that little tidbit of info is up to you I guess, I just like sharing information about metalworking, since I'm a hobby level blacksmith.

And just in case you want to go camping with your metalworking tools, as one does, there are some decent brands that fit nicely in a backpack, and you can get around your campground quickly with bicycles. Just don't bring your phone, they ruin bike trips.