You'll have to try and see what you think. There's debate here on what temp and length of time extracts grassiness/vegetal character, if at all. People perceive hop character differently. I dry hop ~ 65 -68F, then add an oz or two into the keg and leave it in there. That oz of Simcoe is pretty unlikely to give off vegetal character in such a small quantity IMO. You'll just have to experiment to see what you like (or don't). I think you'll be fine even if you leave it in.