Just got back with 619.7 miles on the clock after an extended weekend going to-from and around the area that included most of Saturday around the barns etc. Impressive venue, with for me significant interest in the buildings themselves as the construction methods and designs and proportions differ somewhat to those I'm used to seeing in the west of the UK. Plenty of room to browse and opportunities to change viewing itinerary as demonstrations and refreshment breaks moved people concentrations around, several of the usual suspects noted both demonstrating and browsing, many like me a long way from home, one new face to me was Philip Streeting who made a point of making contact, good to chat Philip.
For anyone with similar distances to travel as me, and an interest in National Trust type properties and historic interests etc. such as Sutton Hoo there's more than enough to fill a few extended days in the area. Thanks for the information EssexChris, hit the venue you recommended and the nearby barn on the trip down.