a mate of mine had a parade of cars from his club (not wrx's) I think there was 9 cars all up. They went on a small cruise and turned up at the ceremony (the groom) and she arrived in a white car afterwards. They then had some photos with & without the cars in them.

Dont go for the limos. Everyone does it. The wrx's, even though other people have done it, its still uncommon. IMO makes it more memorable when you do something different to the norm.
Id offer my car services, but its a drk blue bug