Thanks, again, to everyone for their ideas. I moved up our timeline and booked Yellowstone with Austin Adventures for June 2018

. The geysers are high on DS' list of things to see. My experience with AA has been great thus far and I love that the trip is capped at 18 ppl and will have 3 guides. I think it will be a great first group tour for us and we'll get a good sense of whether this type of travel is for us (though I'm fairly convinced that it is). I'm looking forward to booking the
ABD Grand Canyon for 2019, though I'm a little discouraged with some of the experiences folks on this board have had booking for 2018. It's disappointing to hear that ABD seems to have so little regard for returning guests.