OK-Guy,
Here are my thoughts/observations having organised the 2012 UK Meet.
1. Contrary to residents popular belief London isn't the centre of England, so think more centrically and look at e.g. Birmingham or Cambridge as possible meet places. Just ensure that the location is nearby to a motorway, rail link and that the meeting venue is serviced by a bus route.
2. Hiring swanky venues is expensive and passing on this cost by setting high entry fees will exclude smaller/cottage industry manufacturers and distributors. Thus entry to the 2012 Meet was £35 for manufacturers/distributors and this fee covered the village hall hire.
3. Ensure that the meet venue is accessible, has adequate facilities (toilets/kitchen/tables & chairs) and plenty of free parking. Also check that there are enough power sockets. We had 12 double wall sockets in Cambridge but still needed to buy 3 power strips from Tesco to get extra sockets!
4. Invariably some folks won't be able to make the specified date and ask/suggest that it's changed, so pick a meet date and stick to it.
5. Start a Meet thread and keep it active by regularly updating the equipment list, attendees, manufacturers present etc.
6. Rope in your friends and family to run the event cafe - thanks mum.
7. Hold a charity prize raffle. Solicit small prize donations from audio manufacturers/distributors and publicise who gave what in the meet thread.
8. Charge a small entry fee, e.g. £2. I didn't do this last time and barely covered the event costs. Relying on a `donations' bucket by the entrance yielded a very disappointing amount.
9. Have a first aid kit handy. An audio tool kit of e.g. needle nose pliers, screwdrivers, duck tape, fuses, 3.5mm to 6.5mm/6.5mm to 3.5mm adapters, IEC leads etc is very useful.
10. Don't underestimate the time taken to organise everything!
Cheers,
Andy.