Not let down at all, things happen and we all get busy. I'm moving house, so I know your pain

Right, I propose simplicity. My local is the Number 1 Pub, Cleethorpes. It was built in 1863, the oldest Railway building on the Lincolnshire Coast; it has a plethora of Railwayana displayed there, and most importantly serves Real Ale, fantastic quality locally sourced proper pub grub, at very cheap prices. It's also got a long narrow stretch of ground about one-carlength-deep to the side, as well as a ruddy great bus park opposite. I'll have a natter with the Landlord, see if we could arrange either official cones to reserve a few spaces on the rough ground, or even via the council to get a section of the (mostly always empty) bus park cordoned off for us.
There's a campsite/caravan/premier inn park on the other side of town about three mile up the road. I'm the guy who designs the posters for the Pub, so will check what's on in terms of live events / festivals / etc over the next couple of months, see if we could coincide the trip with a band or something maybe.

Above photo was weekend just gone, for the Armed Forces Weekend celebrations (before opening, incidentally, in case you're wondering why there's no punters!)