It will be tough… if you happen to be arriving in town early in the morning, like 6am-ish, you can try walking into the hostels to see if they have some beds opening for that day:
http://www.euro-youth-hotel.de/
and
http://www.wombats-hostels.com/
 
The Station Hotel has a room for $115 a night per person:
http://www.easypalace.de/station-hotel-hauptbahnhof/english/hotel-buchen.php
 
otherwise you can pay $200 a night per person:
http://www.hostelworld.com/availability.php/HotelNymphenburgMunich-Munich-18809
 
or you can camp for $60 a night:
http://www.munich-oktoberfest.com/wiesnengl.html
 
If you find nothing in München you might get lucky in Augsburg, last train to Augsburg departs 0:09AM.

here are some last minute rentals:
http://www.toytowngermany.com/forum/index.php?showtopic=73177

Thanks for the leads!!!

Once again, thanks!!!  I found a flat at a great rate!!! So everythings a go!!

Good work at such a late hour LB!  
Folks; we are officially at EIN WOCHE on Der Countdown!!!

Just a reminder… there are still last minute ads for private appartment rentals from 30 euros a night on toytown.
 
http://www.toytowngermany.com/forum/index.php?showtopic=73177&st=20&start=20
 
appartments are really the way to go during Oktoberfest because by law they cannot double their prices during the fest like hotels do.

I noticed some folks were expecting larger groups of 6 to 10 people, and some cancelled, etc. There are a couple of such accomodation postings on Tripadvisor/Munich Forum.

Hello
I want to rent my room in Munich, germany.
I´m in India from 6 th of october till 6th of september.
The room is in the middle of the city, you take 4 minutes till central staion with the U-bahn and 5 minutes walking to marienplatz.
If somebody´s interested, please contact me!
You wont regret it!
Wink

2008

Again… for last minute rooms and tent reservations, have a look on:
http://www.toytownge…

Seems that the evening and afternoon table reservations went fast this year (even for weekdays)!
We better get there early.