In reply to Flinticus:
You can have 10 vans in a lay-by, but it's not a proper festival unless Hawkwind play.
I've seen them many, many times. From dodgy fields to proper venues. If they are full on, and have a good lighting rig they are awesome. I last saw them 2013 at Jodrell Bank supporting Aussie Pink Floyd, and they were ok, but it was broad daylight and not much atmosphere.
It will probably be a storming gig. Glasgow is a rock and roll town and they are a rock band.