Combining wallets staked to same pool

I think through my security and fault tolerance risks and backups from time to time. It seems nothing is bullet proof. It would seem to me that the safest thing to do is print out my keys and keep them in a safe deposit box. Theoretically that would protect against fire or some other catastrophe.

What are the weaknesses of the HW wallet? Suppose it’s stolen? Or I lose it? How can I recover from that?

Suppose I want to enjoy an adventure of traveling about with no home base? I’d want to be able to spend my ADA to pay for that. Not sure what strategies I could use to do that?

Of course this is probably best suited for it’s own topic.