I went last year with a big group in charter buses and we all stayed at the same hotel. I would recommend this type of travel if you just want to go for the weekend -- do the ´fest and come back. The trip was really fun!!
Note: Many people embark to Oktoberfest without sufficient planning in a rental car and it ends up being a disaster (no lodging available, sleeping in their car, etc). Hotels that are nearby sell out. The Beer Park is in Villa General Belgrano, not in Córdoba. If you stay in Córdoba it is logistically very complicated to get back to the city which is why group travel works well.
PM me if you would like more infomation on the group that is organizing this year and I can pass along more information. I myself may be joining in again on the fun!
