I didn't go to the SCI Show but I have been there before. This year I went to the NRA Great Outdoor Show in Harrisburg, PA. It's a good show and there is a lot more there than just hunting and shooting.
The Great Outdoor Show is more of a working man's show, cost $12 to get in. Everything at the SCI show is usually pretty high end.
There was probably 300-400 hunting outfitters there. If you're looking for a Western US outfitter there was probably a lot more at the NRA show than the SCI Show.
Your posting of those taxidermy photos reminded me that the best taxidermy I have ever seen was at the SCI show.