If you have an AP the kennel is free.
We've stayed at the HRH and the RPR with our Yellow Lab Destiny.
You can see my two trip reports here.
http://www.nogodforme.com/IOA.htm
At the HRH we ended up on the 5th floor at the very end of a hallway. Took a while to walk to the elevator, take it downstairs, then go outside. But, if you stay at the HRH or PBH, you can walk from the hotel to the kennel. If you stay at the RPR, it's a much farther walk. In our case, we drove over each time.
http://www.nogodforme.com/RPR2005.htm
For the RPR, pets stay on the first or 2nd floor of tower 2. You won't have a view of the park, but that really doesn't matter. The walk to the dog park at the RPR is much shorter. In our case, we were on floor 1, between the elevator and an exit door that led right to the dog park. There is a one time $25 pet cleanup fee.
Bringing a big dog is no problem. You'll have fun doing it. To reach the Kennel, you pay the parking fee, then head to the left following a red line. It's in the far corner of the parking garage. You drop off your dog in the morning, then come back in the afternoon to walk them. In our case, we went back to the hotel room, then brought her back at night so we could see the fireworks show. They bark like crazy, and you'll feel guilty about leaving them in there. On the 2nd day, the wife didn't really care about going to the park, and wanted to hang out with the dog in the room. In my case, the wife and kid would run off and do something while I stayed in the room, then I'd go and the wife would stay. So we kinda took turns, but it all works out.
We've checked other hotels in the area, and the onsite hotels are the only ones that accept larger dogs. Most hotels have a 40lb limit. So stay onsite, and enjoy the visit.