My wife is that type of planner. And since most guys are heavily influenced by their spouses I'd figure the more notice on the calendar, the more likely of attending.
Guys - Not that i'm a formal member yet but I was planning an overnighter at the trailhead of chinamen's gulch on June 24th and 25th and ride Chinamen's on the 25th. I mentioned stock rigs because alot of the people I invited may not meet all the minimum guidelines for a club run but the invite...