<edit>Just ignore if you already read the Tom Line post above. He beat me to it, although we use different numbers. Mine came from
ehow </edit>
Doing some rough estimates on bleacher size
16 rows x 115 ft x 12 ft/in / 24 in/person = 920 people/bleacher x 2 bleachers
1840 people / 88 teams = 20.9 people per team at max capacity.
some assumptions
2 ft per row, could be fewer rows
24 in/person space, std space is 16 in, some bleachers use the 24 in space
100% capacity probably ain't happening, so using the larger in/person size should compensate.
So, 20 people per team in the bleachers seems reasonable, especially considering some teams will not have as many people as they would at a local regional.
Certainly not the ideal that having all the fields in the dome would bring, but certainly workable.