I check out Oktoberfest at the Waldhorn almost every year. Back before work paid my way I would come alone too. It's certainly a stereotype beyond measure here. They've got 3-4 authentic German beers on tap (keeps it real simple). There are the usual food choices and background accordion music through the night.
In short my experience here is "meh". I much prefer the Oktoberfest celebrations you can find at Olde Mecklenburg Brewery. But at Waldhorn they have the usual - albeit a bit overpriced - libations. Like I said, 3-4 authentic German beers including Spaten and Franziskaner Weissbier. You can't complain about German beers - they stick to the rules all the time and come out tasting just fine. If you want some beer variety, this is not the place for you. The prices aren't bad but characteristically steep. You're better off just getting a pitcher. They fill plastic cups that aren't a full pint by far.
For food they've got the pretzels with mustard options but no cheese. These are $2.50. Again, a bit pricey. Lots of plated dishes including bratwurst, schnitzel and hahnchen (chicken quarter). Sides include sauerkraut, red cabbage and spaetzl with gravy. I love the spaetzl and red cabbage but I gotta say both are better at OMB. Sorry! The chicken quarter was excellent however. Meat was "fall-off-the-bone" and seasoned very well.
All seating is outside underneath and around a large tent. You have to pay to get in and then buy tickets to exchange for beer. The tables are in huge rows that you share with everybody. The sun gets hot and cuts through some of the outlying tables so you're better off finding a shadier spot until it goes down. The band will play energetic and interactive traditional accordion music through the entire event. If you get buzzed before you get annoyed you'll probably have a good time. As a final note, the festival is not representative of the restaurant which has an extensive menu of authentic, delicious German dishes.