Wow... that's a big exhibit. I hope sales were good! By "tough" do you mean hard to get exhibit space, difficult to sell, or ??
By 'Tough' I mean both in getting turn out for openings and viewings as well as sales. I did sell some stuff and had a few people contact me for prints in other formats, but didn't sell as many as I was hoping to.
The opening and the exhibit had lots of people go through for viewings though, and the response was good. I had great feed back and the exposure was good. Now my photos that are left over will be featured for the next month in a popular restaurant here.