Thanks for the answers, guys. Elephants themselves aren't a big deal to me, and I've visited several zoos with new, highly rated elephant areas - Smithsonian of course, Rosamond Gifford, Omaha, Dallas, Oregon, etc. But it's a full day driving, so I don't know that I'll be visiting multiple times, given how many options there are out there. Another year or two isn't such a big deal, if it'll make a large difference in what I get to see while there.