I had an amazing time at the festival in April. Abney Park were fantastic and I came away so full of steampunk that I needed to redesign my clothes from the stitching up. If you're going there in October, I implore you to take a ride on the steam bus.
Unfortunately, I won't be able to make the one in October. All my Autumnal resources are bent towards the Asylum in September. (
http://steampunk.synthasite.com/). As it's the inaugural event, it would seem poor form to miss it.