The wife and I are considering hiring a minibus for End of the Road. If we can get 10 people involved it'll be 50 quid, but so far we only have 3, plus our 2 kids. We did this for Bestival last year and it worked really well.
If any of you are looking for transport then PM me. We're based in Streatham but could do pickups from places not too far out of the way.