Patching on the road can sometimes be faster and easier than replacing a tube, if you can locate the debris that punctured your tube.

Instead of taking the wheel off, removing the tube, etc, just unseat the tire where the hole is, pull out the section of tube (about 6 inches or so), rough up the area to patch, spread glue, check tire for remaining debris while glue dries, put patch on, put tube back in, reseat tire, inflate, roll.

I find that to be easier than removing the wheel and replacing a tube. YMMV.