That all sounds like a good idea. I also have second set of winter tires. I might do the same for a spare. Never thought about a spare clutch cable. Serpentine belt on my wifes last car would shred periodically so kept a extra belt and wrench in that one. Then i learned how to tell what the cause was. My brother-in-law said to look at the pulleys and if one is blue or colored from heat, that will be the one dragging. Sure enough it was the alternator and the pully was blue from heat. I replaced the alternator and never had to replace the belt again. But it is good to have a spare belt with you. Good advice Mark