Hey folks, thanks for all of your advice!
Based on everybody's advice here, I managed to find a 2017 Jamis Renegade Exploit in the area. It's got a 1.06 ratio, but most importantly, I verified that it should be possible to swap out the stock 11-32T cassette with an 11-42T, for a ratio of 0.81. I'm gonna take it on some trips first to see if that seems necessary (1.06 is already a lot better than the 1.13 of my current bike), but it's always an option.
Thanks again for all the help!