The grove is by far my favorite place to tailgate.
There are tailgating tents EVERYWHERE and they all have insane setups. It seems like every tent has a specialty that differs from the others. Some look like they're going for a HGTV award with chandeliers and immaculate camping/lawn furniture everywhere. Some look like they opened up a small BBQ joint with foods of all kinds prepared, and there's more than enough to go around (as the hosts will show you). Then there's the tents that look like a tiki bar with their overabundance of alcohol and other drinks. It's insane. And if you came unprepared or short on the goods, your neighbor(s) will gladly supply you with whatever you need/want. The people there are all very generous and offer you food, drink, etc.
There's no telling how many people are in there. It seems like there's more than 80,000 there before the game starts. Even after everyone goes to the game there's around 20-40,000 people (depending on the opponent) still in the grove drinking and partying. The women are out-of-this-world gorgeous, the kids have enough other kids to play football with, and the people in general are as hospitable as they come. It's a beautiful atmosphere as well. There's grand trees, the grass is immaculate, and they have designated paths that make maneuvering and moving very easy.
Just picture everyone in Neyland stadium in a 2 square mile area with ~30,000 tents and enough food to feed the armed forces, and enough booze to put everyone in a coma.