First off, welcome to the forums. It sounds like you already have a great area if you have gotten 50 this season. We have also got about 60-65 this season with some major hunting. So I think you have a good setup as it is.

Something to think about, just like deer. Rabbits need food, water, and COVER COVER COVER. If you can find a crop field nearby, with thick cover. There will likely be rabbits here. You can almost time the rabbits, early morning they will be traveling back to the cover, late night they will be heading to the fields. Find some cover, and your set.

Good luck, Good hunting.