Standing room wraps around the top of the 300 level. I have outlined the configuration of the area in red and orange.
Get there as the gates open and sprint upstairs so you can get a spot in the orange area. This area is unobstructed, as it is raised above the seating below it. There's also easy food/drink access directly behind that area.
If you are stuck in a red area, you will be trying to lean over the seats in front of you for the entire game. It absolutely sucks.
There are also 4 bar areas in each corner of the 300 level. Standing room ticket holders aren't supposed to stand here, but if you can get away with it, do so.