We have enjoyed services at many CGs across the west. However, I don't think I have a digital pic of any of them!
The one that come to mind first is not from a camping trip, but from vacation in Hawaii.. We were in Maui over Palm Sunday.
Our kids were used to getting a small "leaf" from a palm branch. On Maui we all were handed a whole palm branch.. The services were under a thatched roof supported by logs. No walls. Absolutely beautiful.
Probably does not apply to this post, but still my favorite..
I know we have attended services in Rocky Mountain NP, and Yellowstone also.
Always run into the nicest folks at services in the NPs..