Late Night Snack Attacks

I'm really struggling with something that you'll probably think is so dumb. The fitness trainer at the YMCA told me that we sabotage our diets a lot of the time by eating right before we go to bed. The calories we eat at that time of day aren't processed since we are not active and convert directly to fat.

He advised me to not eat anything 3 hours before going to bed. This has been torture! Once the boys are in bed and we're on wind down from the day, the first thing I want to do is find something to snack on. Its not necessary unhealthy snacks but I want to be eating something at that time of the day. So...help me with this. Do you have any tips or do you share the same crazy cravings?