I went there two years ago and he wouldn't let me up to see it. His weak excuse was that there were crops in the field (this won't wash at this time of the year). I told him that I had a good knowledge of the countryside and I would take every care not to do any damage – he wasn't having any of it. I couldn't find any alternative route so I gave up. You may be able to get there by going along the banks of the river, though I doubt it. FourWinds?