I called and spoke to a CM on Friday and she told me that the most days you can order is 8 days, and the prices for 8 days would be $186.82 for park hoppers and $204.92 for premium. HOWEVER, I called again today and spoke to a different CM and he told me that you can request up to 10 day tickets. It's not guaranteed that you will get 10 days, but if they have them available they will try to honor your request. If you want more days than 7, you select the 7 day option and then write in the comments section (where you enter your credit card info) that you marked 7 days but really want "X" days. He said that all orders are reviewed prior to your credit card being charged, and a confirmation email is sent.
Based on this info, I ordered the 7 day tix and requested 9 days in the comments section. I received an email shortly thereafter confirming the order, but it shows 7 days. I'm hoping to receive something that confirms whether I have the 9 day tickets.
I asked the CM about the adult chaperone and was told that kids under 13 are required to be accompanied by an adult. Everyone in your group gets the discounted tickets during ind. enrollment. If the class does not meet the minimum numbers, the families who signed up are contacted and they try to get you into different classes. If that doesn't work out, you can still use the discounted tickets.