I'll add a few things:
If you are going through an isolated area with no cell coverage, I'd take a Sat phone instead. Radios can be great, but unless you know which frequencies are being monitored within range to you, you will have to hunt through them before you reach anyone. If it's a urgent 911 type emergency (and fortunately this wasn't) that lost time could make a huge difference. With a Sat phone, all you need is a clear line of sight to the sky, and then it's a straight dial for help.
A map and compass as well as proper GPS, so when you do get reach someone you can give them an exact grid reference of where to find you.
Also, make sure you have a winch and all your recovery gear so you can self recover. From the pic, it looks like a winch would have saved them 10 days of being stuck...
And... if you intend to go off roading (they mention a "wrong turn" in the article, so maybe they didn't?) always travel with two or more vehicles. That gives you more options for recovery, and worse case if one vehicle is not recoverable or breaks and can't be fixed enough to tow out, you can use the still operational vehicle to go find more help.
