I thought I had this up once, but it disappeared..
Longhorn Caverns located in Burnet, TX is a fabulous place to photograph and light paint. our guide is also a photographer, so he is extremely helpful. All the lighting inside has been changed over to white light from the old incandescent lighting.
It will be limited in space, anymore than 6 photographers and we trip over each other. This will be on a Sunday...
Compared to Inner Space, this is a four hour tour (approximately), the formations are curved, being made from flowing water. There is a Crystal area, that is great for macro.
What to bring:: tripod, water, release cable (or use timer) flash lights, colored gels, sturdy shoes and know your manual settings on your camera.
There is a cost of $47.50 per person.
The RSVP are limited, but given the time, there will be people who will come and go. I will have a waiting list and if need be, I can schedule several Sundays for this Meetup.