Clearing Land in Idaho

Hello everyone, new to this forum. I have a question about clearing land at my ranch in Idaho.

I just put an old iron truss bridge (1902) across the river and I know want to clear out some of the other side. It's cottonwoods and the soil is really rocky. I can remove the trees with my excavator but what is the best way to clear the land. It's really rocky and my fear is I will not be able to smooth it out to seed native grasses.

I have an old 1979 CAT D3 for a dozer. I have a CAT 308...

Clearing Land in Idaho

Clearing Land in Idaho