We boondock, and there's never a cell signal.
We have not seen fit to get FRS radios, but if we needed them, I'd search several ratings sites such as this list.
While they are limited, they can be very handy for reaching someone across the lake on a kayak or hiking up the face of a mountain that's in plain view. Where we camp, lots of neighbors use them to reach their kids and so on. The beauty of a well made FRS radio is that the squelch keeps the radio silent unless someone is attempting to reach you. An abundance of channels on most of these allows a modicum of privacy and selectivity in which conversations make it through to your radio.
This article outlines basics for the FRS and more powerful walkie-talkies. https://talkiespy.com/best-walkie-ta...-buyers-guide/
I don't claim it's the end-all-be-all for authoritative info, but it does discuss unlicensed and licensed unit going up to 2 to 4 watts or so.
It depends on what you need. While using them for backing into a site is nice, you may quickly find other uses that require a bit better performance.