Pyroman,
A how many pilots do you have total in the squad?
B of those how many can you typically expect to show up for a fri night event?
The more the merrier basicly. The more guys you have the easier it is to fulfill your mission goals. Better odds if you run into enemy fighters, or more damage if your bombing enemy positions.
Each squad gets the chance to state a side preference before the start of the tour.
However, keep in mind that your preferences may not always be possible. Expect to fly both axis & allied. Also expect to fly all aircraft, fighters & bombers.
If you signed up today you'd probably start with the first frame in november. Unless they need you to help balance current numbers.
As to where Fri night in the SEA 11:00 Eastern.