We do 1-2 acre plots - but we do several of them. Also, the neighboring land is farmed, (alfalfa, & soybeans both are planted 20+ acres) so our plots are not hammered to death.
They get a lot of use still- and sometimes the 1 acre plots are too small and get over-browsed.
2 acre plot
1 acre plot
Sometimes we mix it in strips with corn
FH