Safe Haven Forest Retreat was ideal for our large group. It had three-levels, so we could easily separate our group meeting time in the 1st floor open area (with a ping pong table that we thoroughly enjoyed, but bring your own paddles!), eating time by the kitchen on the 2nd floor (more than enough plates, bowls, utensils, and a brand new, very efficient dishwasher, and tons of chairs), and sleep time mostly on the 3rd floor (with a smart bathroom layout so it was easy to assign rooms to particular bathrooms to prevent overcrowding). Everything was labeled so we knew exactly where to find items. And the owners are super responsive, returning emails within a few hours and getting the security deposit back to us promptly. If you have a large group, consider telling people to bring earplugs as the walls are a bit thin and those who sleep early may be disturbed by those playing board games late into the night :)
All in all, a great experience! We may make this our annual retreat location!