The 300M Club had done something like this two April's ago in Astoria Park. Several members had come out for that and no doubt many of them would do it again for a day!
Try posting this there as well here to generate some interest (Keith Jarvis, SilverSpecial, would have some good ideas to get this off the ground). I would also suggest opening it up to all LH vehicles, not just 300Ms. After all, the more the merrier!
I would very likely consider coming to this meet, though I think I would take my Charger instead of my Special.
2002 Chrysler 300M Special, DSB | 2007 Dodge Charger R/T Road & Track, BB
2000 Dodge Intrepid SE - Champagne | 2001 Dodge Intrepid ES - Sapphire Blue Pearl | 2003 Pontiac Grand Prix Ivory