Just to say - at Prestwick the club can't do handling - members only. The Flight Centre are fine - although technically they are also only supposed to handle you if you are a member or are receiving maintenance. They are normally quite accommodating but you do need to organise in advance and tell ATC where you're going or you will be sent to one of the other FBOs. They are also friendly but do charge more.
The airport is currently undergoing transitions regarding FBOs (they are planning on doing the handling themselves) so things could change at short notice - best to phone just before you go to make sure.
However as an airport - they are very used to / accommodating to small GA so if you want something unusual they can normally sort you out.
No micros (due to insurance issues after a jet wash ground incident) but that wont bother you.