I find sometimes just asking is always the best way :).
But if you want to, you could just bring it up and be like "Soooo what do you think about bedtime stories, is that something you would like?" Or you could say "I would like to do more stuff during our night time routine, like maybe...
Let me start off by saying a long distance relationship is not for everyone. It is hard, alot of work, and you need to have a lot of trust and understanding.
My daddy and I did a long distance relationship for a year and a half, I was in Colorado and he was in Florida. It was really hard...