If you are taking the shuttle straight to the park you can get off at the first stop across the bridge and walk over to the park...you can stay on the shuttle an extra 10-15 minutes and it will drop you off right at the park on its way to Newport if you prefer.
If you are taking it to 5th & Vine it stops right at the 5th street side of the Westin and 5th & Vine is on the right. You can go in the main doors on 5th street or the "kinda side" doors on Vine st.
If you need any help taking the bus from Ky to Cincy PM me and I can help you. If you are right on the river in Covington you will be very close to me.