RE: What do you do with the tank vent?
The information you have already received is correct. I do mine the same way as Josey suggested. But....., When I'm done flying for the day, I always put a "fuel dot," on the vent (over flow) line, to keep fuel from dripping out while transporting the plane.
Caution: Don't forget to remove the fuel dot on the vent before fueling, and flying the aircraft.