I went to it last year and it was absolutely worth it!
As Denny and others said, the hop aroma recognition thing is quite hard as your senses get overwhelmed and you are under time pressure. I was in the last group to do it and many of the vials were empty by then.
The other thing that was a wake up call was seeing and smelling all the candidate plants. They were all genetically distinct yet there were fields of them. I don't remember the numbers but it was along the lines of for every 1 varietal that makes it into production there are a thousand or two that never do.
If you ever get a chance, just go. You'll be really glad you did.