I go into Duxford fairly often and have found them really helpful.
But I have also learned that when warbirds are about you do need to stand off a bit.
Personally I hate it when on short finals someone creeps on to the runway or cuts me up on the approach. I generally have a quiet word with them afterwards, though have been surprised just how many don't accept they have done anything wrong.
I do wonder if some warbird pilots have a sense of entitlement and feel they don't have to obey the normal rules of the air. That said, some of them are the nicest pilots I have met.