[masraum]

Yep, let it grow. Maybe find out what sort of plants/flowers are native to your area (not just the junk that HD sells) and plant some of that or spread some seed. Let some of it go "natural" and keep the yard a yard.

The only thing, to think about, do you have snakes, rats, etc.... that might decide to take up residence in the wild areas? It's probably not a big deal for you, and as long as you keep the "yard" (near the house) mowed, that'll give you the DMZ that the critters are likely to avoid because it offers them no cover.

Yard maintenance is time consuming, and 3 acres with creeks is a lot (we've got just under 6. I eventually talked the missus into letting the bit across our ravine/creek go wild.

I say do it. You've got plenty of other stuff to do than to spend 1-2 days/wk dealing with 3 acres of yard.