Also how long of a run are you planning? Need to let babysitter know. Lol!
It really depends on a lot of factors, group size, stucks, even breakdowns. So i am thinking around 3 ish is a safe time to say we will be done, from there is the drive back to town. Again it could vary.
I do have a CB, having a couple people with radios is nice, but it is not a requirement.