Fortunately the Enfield has a centerstand. You will need all the tools necessary for removing the wheels from the bike, the tires from the wheels (including tire mounting lubricant) spare tubes, and a way of inflating the tubes. I used to use a hand pump, but have switched over to a small 12V electric compressor. You can also carry a tube repair kit, but it has been my experience that punctured tubes usually pop like a balloon, making them impossible to patch.
I live in AZ, and it seems that about half the state lacks cell phone coverage, so you need to be prepared to take care of things like flat tires yourself. I have also spent many decades riding dirt/dual sport bikes way back out into the AZ desert, where road service is not an option.