I do a lot of solo driving and exploring, all over America, though if going anyplace new with potentially way rough terrain, if I don't scout it first on foot or on my bike, I just don't do it. I'll keep it in mind to do with a pal and another rig, not just co-pilot usually. I have no real interest in being part of a long line of vehicles, caravan style with any more than 4-5 rigs, all doing the same thing and waiting in someone else's dust for another vehicle to get rolling.
Small groups, yeah, you bet. Too many rigs, too many people all trying to do the same trail at the same time, not fun for me.
If going back-country anywhere solo and out of range of cell service, I definitely let someone know where, when, for how long, and when to send out the Mounties if they don't hear back from me.
Slowly teaching myself more about proper comms, locators, and survival techniques, which have all always fascinated me. Now I have a little more free time to more fully explore it all.