Elwyn Station Boarding Question

I'm taking the R3 (media elwyn) into the city today from Elwyn, a line I don't normally use. Does it matter which side of the tracks I park on? Anotherwards, can you park on the side that would be West Chester/Wawa-bound trains (if only) and then cross over somehow to the center-city bound side? I don't see a bridge or a tunnel in the pictures of the station crossing the tracks so I'm curious as to how this works, and if trains always board from the same side platform or do they sometimes board on the outbound side and just reverse direction and cross over to the other track.
Also, anything interesting I should be looking for as I'm riding?

They can board from both sides, it is rare though, they are usually on the inbound side for boarding, there is a crosswalk at the station for you to get from one side to the other, the inbound train pulls far enough into the station that you can still use the walk without problems.