Go along for the full 3 hours. That way you'll know at least the volume of competitors.
Also, borrow a rusty, shitty, massive van. Park it right outside. Find some local scumbag kids and pay them £20 to hang round outside being a nuisance. Organise a fixie beers meeting outside.
Know anyone who plays the bagpipes? They're handy people to know if you want to get people worried about noise. A chalk Saltaire on the payment opposite and an enthusiastic bagpipeist should do the job nicely.
Go along for the full 3 hours. That way you'll know at least the volume of competitors.
Also, borrow a rusty, shitty, massive van. Park it right outside. Find some local scumbag kids and pay them £20 to hang round outside being a nuisance. Organise a fixie beers meeting outside.