You obviously have some longer and shorter runs, and there may be situations where you need to take two vehicles instead of one. We haven’t done this a lot, but based on our experience with some of these runs, I’d say that $20-$25 per person per leg on average might be a good starting point. In other words, for four round trips, maybe an estimate of $150-$200 per person is a good starting point. With tips, it might be a little more, so you may want to be conservative. Again, we haven’t done this a lot, so others may be able to correct this. I hope this helps!