The correct stabilizer will increase your accuracy, finding the correct one will entail some research. Personally, I've never delved into it to get the correct one yet but with online info now a days, it's easier then ever. Look at this article, Stabilizers, balance, and bows for a detailed article into the theory behind stabilizers, it's not just about the weight.
As far as other accessories, bow mounted quiver, string and limb silencers, and most important, silent clothes like fleece and not that breathable junk they sell at the box stores, pure fleece, no nylon or anything else that produces noise when it moves, you will be close to the game and you don't want to give them anything that will allow them to jump the string.