I boarded the Missouri in Astoria, OR in 1998 when it docked at its last mainland port after it had been decommissioned and was headed to Pearl Harbor.
I live in San Diego, CA and Iowa class battleships were frequent visitors here in the '80s. Very impressive to watch them come into port and dock at North Island but as a civilian I never knew one was coming until it arrived so there were no visitor passes left to board the ship. In 1990 I was assigned to work in Hawaii for three weeks and that was the Missouri's home port. While there it was no problem at all visiting the ship, almost had the ship to myself (except for the sailors).