Traveling in a group— How do you handle it?

This same sort of thing happens with groups of motorcycles. There is usually three of us on the bikes. Me, my wife, and my son. We each like to ride a bit differently and will sometimes get separated. I'll usually stick with my wife but we just tell my son we'll meet up with him at our destination. My wife and I have a helmet communications system that can use bluetooth or our cell phones for a longer distance of communications. I can be ahead and let her know of any road hazards or traffic. Or I can call my son who is probably waiting at the appointed meet up spot. When we camp with friends it's pretty much "We'll see you at the campground"