H.S.
If you just want to celebrate each others company, you don't need to go out of town, and waste money. You could go somewhere that you went when you first met, or plan a personal day with a couples massage, dinner, and "desert". There is a dinner theater in Springboro called La Comedia. I've gone several times for special events, and it's such a fun night. If you want to involve children, we LOVE The Great Wolf Lodge. It's really a great family place. There are dinner boats downtown also.
If you must leave and get away for a while, you could go to Puttin Bay (above Cleveland), or Chicago (5 hours).