I have to admit to being a bit of a "prepper". I guess it comes from living in an area that gets a lot of hurricanes. I do carry tools and some spares when I ride locally (though I don't carry tire repair stuff on such trips). I have never needed them for my T100, but I've pieced together more than one Sportster that vibrated various parts off while riding with friends. I carry stuff like tape, tie wire, zip ties, and Loctite along with a very small toolkit. The whole thing fits in a small compression sack that tucks into a corner of my tankbag. I also bring a rainsuit and one of those backpack/grocery bag things in case I have to bring something home.
Oh, and I forgot one small, but very important item for the tire repair kit...you'll need a valve core tool, also.
As for the upcoming apocalypse...the only prep I did was to go to church.
2003 Bonneville T100 and 2007 Moto Guzzi California Vintage