This is an excellent topic for Overlanding. I can't say enough about how important it is to have communications, both within the group and outside. In the event of a serious injury, you need to be able to communicate with someone for medevac. And if everything is going well and you want to extend your trip, you need to let someone in your network know that your are alright and your new ETA. you don't want someone calling for a search and rescue operation only to find you kicking back by a lake drinking beer. It happens!
I have three radios (four if you count the Sat Phone) I take into the back country. The main radio in my 2011 JKUL Rubicon is a Icom 7000. It literally does everything on HF, VHF, and UHF, but my interests are FM, SSB and CW. On the road, I'm using VHF. I'm seeing more groups using the 2 meter band for intergroup communications, but at the base camp I prefer setting up an external antenna and doing HF. Lately, on longer trips, I have used Satellites to friends back home. I made a handheld circularly polarized antenna and had some great QSOs.
I have a CB for when I'm with groups that don't have VHF. I actually have two radios, a COBRA vehicle mounted radio with SSB, and Hand held with weather. I also have a Yaesu VX-8 which we use for dismounted explorations. We always leave someone with the vehicles, which act as our base camp. While dismounted, we communicate with the base using the Yaesu. This also has APRS which ensures we don't get lost.
The amateur radio community is great. If you need help, they are there, whether in a natural disaster or calling for a broken part in the back country, they can be relied upon to forward the message to get you the help you need. Hope to see you or hear you on the trail.
KJ6KYQ 73's