I won't be able to make it, but I believe that they key is not how many people are going, but the number of vehicles. If 20 trucks show up, it will attract a lot of attention. If 20 people show up in 3 or 4 vehicles, the parked vehicles won't seem so suspicious.
Baby Beast 2- 1999 4Runner SR5
Baby Beast -1987 4Runner SR5-Gone, but not forgotten