Hostas are EXTREMELY hardy - especially when established well. In the fall they will die back and you can just pull off/mow over the leaves. In the spring, they will grow new. Grubs, unfortunately, like to eat the leaves and make them spotty/holey. You can rip them up and move them, take whole chunks off the side of the root ball for planting elsewhere, or just chop whole chunks off the root to toss out and make the plant a bit smaller again. Unless they are in full sun (they like a mix of sun & shade), they'll bounce back from just about anything you can do to them. One of my favorite plants because they aren't fragile and nearly everyone can grow them. :)