It IS a big deal to secure a venue, lodging, sponsors, registration, staff, volunteers, vendors, T-shirt production, set up a drive, etc.
If it's a matter of piggy-backing onto an existing event, you'll have much less stress, and be less disappointed if the turnout is lower than expected.
I know you're a fan of the overnight tour, but many are pressed for time and $$ and prefer a day trip.
NCC used to have a summer crabfeast/gathering at Patapsco State Park. I usually filled up on sides, as I'm not proficient with a crab hammer!
_________________
John in VA
'74 tii "Juanita"
'85 325e "Ol' Blue"
'86 535i "M-POSSTR"
'00 328i "Fern"