A while ago I talked to a person studying theology at university to become a minister. I asked him about spiritual experience. He answered that he doesn't have any strong spiritual experiences and most of his classmates also haven't. A few have and he considered them a bit strange because they were than also serious about things like no-sex-before-marriage. He was religious because he was brought up with the rituals of religion and not based on special spiritual experiences. The conversation took place in Berlin with is culturally different than the US, but he still considered himself to be really religious.

On the other hand I do have experience surrounding what most people would call a near-death experience. I do meditate together with nonreligious people who teach not to take visions during meditation too seriously.

It's quite interesting that the spiritual experience of you was at a Christian summer camp and not in a church on Sunday. The Christian summer camp is not a standard institution of Christianity. The church on Sunday's is. To me the church on Sunday is not a system that looks like it's designed to produce spiritual experience. That's how people can work on becoming Christian ministers without having had spiritual experience.

When it comes to the spiritual experience of lay people I Christian's burned women as witches for going in that direction. I don't think focusing on creating spiritual experience is a traditional focus of Christianity.