Not sure how much it matters. If you have an electrical problem on a stock vehicle that blows fuses and/or burns up wires, chances are it isn't going to be laying-in-the-dirt-with-a-wrench kinda repair.
Having said that, it wouldn't hurt to follow 05DC451's advice as the space/weight is minimal.
I also suggested in one of your similar subject posts some time ago that one of those roll-up solar charging pads would probably be a good investment for when you go into the hinterlands. You can set them up as battery trickle chargers, cell phone chargers/power, etc.
there is no cell service out there. i have tape and tools. i was hoping for an idea from someone on a particular relay or fuse or sensor or "?" that may be a 100,000 mile lifetime part which would be good to have in case. maybe a 4x4 actuator or similar. i didn't mean to imply that i needed a bunch of 10 15 amp fuses. it seems that the tundras don't have many electrical issues so maybe my question just got answered...