Very responsible man! Good to know there are still people out there like you and your wife! Thank you for helping them! I just purchased my very first Jeep and plan to do a few trips. Until you mentioned it I would have never thought twice about it. I will look into this for sure. If you have any links for the setup you have please share them!Love the build so far, but to address your question about comms I would highly highly suggest getting something whether it's a ham radio, cb, or a race radio anything will be better than nothing.
To give you an idea of how important it is, my wife and I went down to Big Bend one Spring Break to do some back country wheeling and camping, on our very first stop in the park we got out to hike up to Balancing Rock, we came across an elderly lady who seemed very lost. We sat her down and were able to get her calmed down enough to find out that she and her husband had went out to hike up to Balancing Rock and her husband decided to take a right instead of a left despite her protestations. About three hours had past when he left her at the point we found her at.
My wife stayed with her to give her an opportunity to calm down some more and I ran back to the Jeep and got on the radio and got in contact with the park rangers to start the search and rescue. It took the SAR unit about 45 minutes to locate the husband who was suffering from partial dehydration and heat exhaustion. When we got back to the ranger station they were very thankful we had stopped to help and even more thankful we had a cb on the Jeep.
A CB radio is one of the cheapest mods you can make to your Jeep but probably could potentially be one of the most important ones you have. Oh and Big Bend is notorious for having little to no cell coverage throughout the whole park which is something a lot of parks suffer from.