Oktoberfest is a remarkable event; 100,000+ people together drinking heavily, and yet few problems. It’s crowded though, so crowded your neighbor’s back rubs gemütlichkeit against yours at the beerhall. If you can find a place to sit. I don’t love crowds, here’s how we coped.
Go when it’s less busy. It’s not complicated: weekdays and earlier in the day are quieter. Monday early afternoon was pretty mellow, by which I mean the tents were only 75% full.
Consider a small tent for dining. After drinking our fill at the Augustiner tent (population 8500) we wandered off and found a tiny restaurant tent that sat 200. Most of which were staff on break from the Ochsenbraterei tent next door. It was still festive but plenty of room to have a comfortable lunch.
Drink wine! When the crowd got too much we found our way to the Weinzelt tent. It’s a big tent but an odd one, serving mostly wine. It’s a bit smaller, maybe 2500 people. Best of all instead of back-to-back benches, everyone sits at their own booths for 8-10 people max. Way more comfortable. Great music and party too! The drawback is that it’s expensive; 75€ for a bottle of wine instead of 11€ for a liter of beer. But it's a good choice if you want to trade off money for comfort.