I go about this in a slightly different way since there are so many different types and sizes involved.
I do a bit of study of the main issues that a blown fuse might cause and then look for what I would do for that situation. Many times, it will be a fuse that is not important enough to change until I would get home or to a spot where handy.
Things like the fuse for the dash 12v outlets that power my GPS or TPMS, the dome lights, etc. that I can live without fall into this group.
But then there are some really, really important ones like the headlights, turn signals, etc. so I consider what to do if they blow and how often does that happen.
Most of the time, my fuse failures are do to me working on something, so I've learned not to work on things if I'm not in a situation toc over my mistakes! Never take plumbing apart late on a Friday night when the stores are closed! It makes the gremlins come out!
But then there are failures that are in critical systems and I often find those can be covered by moving fuses from less critical for the short term.
I carry a few fuses as I do not have a history of blown fuses while on the road and expect to swap out from a non-critical system if I have to. Some systems actually have a few spares in the lid already!
Most of the fuses I now carry are due to having to buy five in a pack when I have screwed up and blown one!
Why no RV year, make and floorplan on MY signature as we suggest for others?
I currently DO NOT have one!