I have a neighbor who stops by and is under instructions, "DON'T PANIC! Just send me a message and I'll walk you through anything that needs fixing." For 25+ years, I travelled weekly for business, and only had one call and no fish were lost. (I'm relatively new to Florida, so "we" haven't been through a hurricane test scenario.) The 3 things I stress are 1) Don't stress, 2) if you add water, add conditioner, 3) don't over feed the fish.
I'd think a pet sitter can learn the basics (leave it in writing). Are all your pond hoses within the liner so any loosened connecions don't result in pond drain and your pump off the bottom of the pond?
Good luck (refer to #1: don't stress)