If you are trying to book a room in Munich during Octoberfest, beprepared to pay through the nose on cash rewservations. I had a business trip to Munich that could be done the current wekk or in two weeks time, abd the difference for a hotel room would be abou 100€ for this wednesday vs. about 400€ for two weeks from now...

My guess is that points is your best option if you can get a room with them, or take the gamble and use priceline.

In terms of location: The Courtyard is two stations away on the underground to the fairground, yet the other two Marriott properties are not that much farther away as well. The Renaissance also sits right above a subway-station, and the Marriott is also pretty close to one. Not sure how many stations to Theresienwiese, however, and if you may have to change subway-trains. All in all I like the CY in MUC more than the Renaissance, but I have not yet stayed at the Marriott in the city.

Greetings - Dirk