What would be better is just to introduce trials obstacles at a skate park that everyone can use, e.g. rails, walls at different heights, widths, shapes and spaces aparts etc...If this could be incorparated into a skate park it would be do-able. I dont really care about parks though, and anyway it would be one less excuse for riding street and i couldn't wear my 'strictly not 4 skate parks' t-shirt Steve