There's a pub called the Orange Tree a few minutes walk from the ground, where most people congregated before and after the game a couple of seasons ago. For reasons unknown we weren't allowed in Braintree's clubhouse.
Braintree were in the National Division when we visited for a cup match three seasons ago. At that time they had segregation for their league matches with only home fans allowed in the clubhouse and kept those arrangements for our match, possibly because we had a large travelling support even though the home attendance was small. The Orange Tree is the designated away fans pub for segregated matches.
I would hope there will be no segregation and that the clubhouse will be accessible to all for this South Division match, but the Orange Tree is a nice large pub that made us welcome last time and the obvious pub option close to the ground.