No way I trade the 18 Brooklyn pick for Paul George. I'm not sure he's worth it even if he were to stay (which I don't think he would). Here's my strategy.
1) Draft Fultz
2) Go after Hayward or Griffin (I know he has an injury history, but I'll take that chance if the only thing he costs us is cap space)
3) If we can't get either Hayward or Griffin, offer our pick (NOT the Brooklyn one) and Crowder for Carmelo. I know it's not ideal, but he would only be on the books for two years. Take a shot, with him, IT, Fultz, and Horford and if it doesn't work, build around Fultz and the 18 Brooklyn pick.