Just an idea bearing in mind a fair few stand round at meets thinking "hmm who's who then?"..would there be much interest in wiltshire bikers tshirts, possibly with people's forum names on?
Cheapest option is white or grey, maybe with www.wiltshirebikers.co.uk across the front middle and name underneath, or possibly WiltshireBikers on the breast with name under that?
Just an idea seeing as a few have mentioned not being noticed at meets!