I carry an inexpensive air pump that works off the cigarette lighter plug all the time in my tow vehicle (whether i have the camper with me or not).. I also carry inexpensive tire repair plugs and the tool so if i get a flat i just throw a plug in the hole with some rubber tire glue cut it off even with a knife and air it back up ....done and i don't even take the tire off the vehicle.
someone showed me years ago that if you don't have the tire plugs just take a sheet metal screw off your vehicle somewhere and screw it into the leak on the tire.... I did it a few times and it amazingly doesn't leak but i fix it the right way when i get back home.
The off roaders take tubes of super glue with them to fix flats. Stick the tube of glue into the hole, squeeze out the whole tube, remove, and let the glue setup. Saw a guy do this out on the trail down at Big Bend. Once he aired up, he finished the trail and drove home. Same principle as the sheet metal screws. I think I'll throw a few screws in the box with the super glue. Thanks for the tip.