I went in 2000. It was fascinating and I was a real beginner speaker then, so much was confusing, but you get the basic plot. :-)
Remember, it is outdoors, rain or shine. It snowed off and on my second day, which was one of their last showings, early October, so pack accordingly. Also during the day meal times the town is swamped, so many restaurants cater to the tour groups. Plan accordingly for that also, there could be some long waits if you hit the wrong time. Make a reservation at the magician's restaurant ahead, well worth it, fun for the whole family.
As for tickets, they can sell out fast on some dates, with large tour groups, etc. I only had a few days notice my hubby and I were going there for business, so tickets were obviously sold out then, but I stood in the 'return ticket' line early in the morning the first day of the show and got a seat. My seat wasn't that fabulous, slightly behind a post, but the guy behind me in line needed two tickets and just as I left the booth, an attendant came in with more tickets, he got front, center, a couple rows back!
Indeed, the website will have more information as it is made public. Hotel is really the problem, too, but they are well versed in managing the crowds. See what you can get early on and don't hesitate to contact the town if you have any questions.