all cruises i been on have had responsibile ppl leading and every1 overtook with out making it unsafe for others. I dont think there is any perticular way of doing it, and it just common sense really.
The unsafest part of the cruise are the ppl who r not on the cruise...its happened to me many times where a motorist has got in my way, not their own fault but not aware of wat is going on, or a motorist purposly trying 2 get in my way because they see that were on a 'skyline cruise'.
on the last 1 i went on to barrosa, a few of us overtook this car who was going slow, prob a local, and when it got 2 me, he started to go crazy, he was swerving side to side, breaking suddenly and then when id go 2 overtake, start accelerating...so i just backed off and let him have his way.
UHF radios r a good idea, and we've had them on a few occations, so r having lights on,...(i always have mine on cos they look cool lol)
In conclusion, accidents happen, so all we can do is try and drive as safe as possible by using common sense.