Hi sara,
I have the very same scenario for my eldest son, beginning of July though, so not in two weeks time, as your daughter has........He has asked his friends and they seem to going the limo route....but they may decide to MAKE their own limo out of who knows what....paint it etc.... and arrive with their 8 or so pairs of feet inside it and make their grand entrance.....i think it's a great idea.....can just see them shuffling up the drive on the night.....lol
Fire crews would normally be more than happy to help you in this instance, my lovely, so dont be worried about them saying your stupid........even if they have an emergency at the exact time your daughter and her friends need to be dropped off, they may be able to send a small crew to help out anyway. Ask them first and see what they say.
Hope it all goes brilliant on the night for your daughter, sara, and she has a smashing memory of the occasion.....and make sure her and her friends take stacks of photos's.