This is what my WC said to get a copy of the cert sooner.
The minister is legally NOT allowed to sign a copy of the marriage license as he can loose his license! So what you have to do is make a copy of the original license once you have obtained it and ask the pastor if he can either sign that copy after your wedding OR better yet, if he would be kind enough to send you a copy of the license prior to him sending it off to Oahu.
HTH!!