I keep a Rema patch kit in my tool pack in case of a really bad day. I also have a few pieces of Gorilla tape on the Rema box for use as a tire patch/boot if needed. I actually used Gorilla tape as a tube patch once; held air just fine for a couple days!
On the subject of Rema kits, I only carry a new, unopened tube of the "glue".
I recently added a pair of tweezers. I had a flat awhile back and the culprit was difficult to get out of the tire.