When we were there in Jan of this year, the show times were: 10, 11, 12:15, 2, 3, 4:15, & 5 Sunday thru Fri and on Saturday it was 10, 10:45, 11:30, 12:30, 1:45, 2:45, 4, 4:45, and 5:30.
How early to get there depends on time of year you are going. When we have been in the off season you can arrive 20-30 min early and get your choice of seats or even arrive as it is letting in and sit in the back. From your countdown, it appears you are going end of Aug 2005 which should be a low crowd time as most kids are back in school.
Everyone sits on the floor in 3 sections - one center and then one each on the sides with a aisle between. Since it is in a semi circle unless you are to the extreme ends, most of the seats are great. We have sat in all 3 sections and never had a bad view. At 2 of the shows we have been to they ask the kids to get up and do join in a "train" doing the "Bear Cha Cha Cha". (THey did not do this on one of our visits.) So sitting near the aisle so the kids can join in is fun. Also when we have gon in the past, I try to leave space between the people in front of us so that my dtr has room to stand and dance. They invite the kids to get up and hop, jump and dance in place - so make sure she has room to do this.
My dtr loves this show. She is now 3 but has been when she was not quite 1, 1 1/2, and 2 1/2. They do a good job of trying to keep the kids involved and entertained. If she watches Rollie Pollie Ollie, Pooh, Stanley or Bear in the Big Blue House, she will love it.
Have fun.