Radios ought to be mandatory for ALL airports over a certain rwy length, say 600 mtrs, less than that there are only toy planes that can land on that & it's unlikely you will find traffic at varying Alt's anyway.
CW - I take offense! I regularly fly into strips about half that length and at almost 3.5 tonnes burning kero I wouldn't call mine a 'toy' aeroplane!
I know - not fair, different country and not what you had in mind when you wrote that... Just couldn't help myself
