I can't be arsed to read all the replies here so I'll just put in my sugestion and bugger off again.
There is only one thing I'd like to see at Avebury/Kennet/Silbury.
Won't cost much.
Won't spoil the vibe man.
RUBBISH BINS !
Make them out of wood/stone/plastic I'm not fussed.
Just put them out there for the dirty bastards to see and maybe use.
Sort me out a couple and I'll put them out myself.