Flossbolna, maybe that was the problem, I believe that we did go on a Saturday. As you said, the tents are very impressive. But there was nowhere for anyone to sit. We stood inside to watch the crowd and listen to the music a bit. You might want to think twice before taking your kids in the tents. We did see a bit of nudity and sexual high-jinx going on. I should also say that this was a number of years ago. So things may have changed since then.
Warning: Bring some TP for the bathroom. There was none in the stalls and they were selling it by the sheet at the door.
Now, other than the Oktoberfest, we absolutely loved Germany. We were stationed in Wurzburg and spent a lot of time traveling all over southern Germany and Austria. Some of the loveliest countryside I have every seen. And the food and beer are second to none, in my humble opinion. Watch out for the desserts. They aren't as sweet as they look.