Glad you had such a great time! Riding in the rain can be fun and those photos are great!
I've ridden in the rain multiple times. Manly because I had to work horses everyday, rain or shine, for a while. My favorite time when I was riding recreationally though.
I was a teen and I was in the woods alone. A thunder storm came right up on us very fast and my horse and I booked it through the woods to a shelter I knew of. Lightening was flashing and thunder was pounding, and we were galloping through it. It was amazing!