Dobbs weir is a pretty safe mooring and well used although it may be a bit noisy if you are too close to the bridge as they are still finishing the bridge replacement works. The station is about 20 minute walk away if you need it. The only pub is located the far side of the bridge, they do good food and get quite busy this time of year
Sorry being stupid, Dobbs Weir is on the Stort not the Lea but it only about and hour cruise and you can turn through the bridge