Igers Indy met at the zoo in the summer of 2016. We were able to walk around and explore as we wanted. Some sticking to groups, others breaking off on their own. If your city has and Igers group, I’d recommend attending an event. People of every skill levels show up. iPhone only, to people who use lenses more expensive than that brand new Mac laptop.
Here’s a tip that I learned from another member about water exhibits. If you want the animals, including dolphins to come right up to you, pack an ordinary $3 plastic comb. Place the backside corner of the comb up to the glass, and slowly run your thumb down the prongs. The animals will come up to the glass to check out the noise. No joke. Worked every time.