The world already has descended upon Puna, and one look at the traffic will support this claim.
There was a time when we'd sit at the corner of 7 & F and drink beer, and not one vehicle would pass by for hours.
Can openers? I just bought the second to the last Swing-a-way ($10) from Hara store. The red handled one was the last one I saw for sale there. I swear by the Swing-a-way brand, and if that brand is unavailable, a P-38 will be my 2nd choice.
Rain gear? I still use my ECWCS without the liner, but most any microfiber material will do. Frogg Toggs are a good brand, but Hara sells them at an exorbitant markup. The rubbish bag trick is OK if you're not exerting yourself, but once you start working you'll end up soaking with sweat.
Better to use GoreTex.
Security? Family & friends are how I've always done it. I have one of my kids housesit when I have to travel, the bonus is that they love my dogs as much as I do, so I know they're in good hands.
"Life is labor, and all that is good in life comes from that labor..."