>> Was it just me or is it a bit difficult to work out what's
>> going on at Windmill hill?

>It's just you :)

:p
I walked in from the east entrance between 2 mounds and then sheltered next to a huge barrow. Despite standing on top of the barrow for 10 minutes and trying to compare my eyesight to the map, I wasn't able to make out any form of circular ditch / bank.

Maybe next time I won't get so stned when I get there and I might stand a chance :)