On our SAR team almost all of us are licensed amateur radio operators because we work in a lot of very steep and heavily wooded terrain. FRS radio communication does not cut it for us. I know you are talking about getting a radio to monitor but being able to contact help if the need arises (more likely to request aide for someone else for many of us here) is invaluable. I carry a waterproof Yaesu VX-7R which allows for the monitoring of MANY bands and to contact other operators on a couple of bands. The VX-7R is overly complex for most people (including myself). There are other great waterproof offerings and we have had great luck with Yaesu. After Katrina hit volunteers with amateur radios did a lot of the heavy communications in and out of the disaster area because so much infrastructure was out of commission. It could be a life saver for you or someone else along the way on mountain roads as well where cell service gets spotty.
KE7EVC
We do the same thing using Yeasu VX-7, 8 & 9s. We also station a 4 wheel drive rig with a Yeasu mobile equipped for cross band repeat which even further enhances the HTs range especially in deep canyon with heavy canopy situations.