okiejoe wrote:
2 years ago my wife and I towed our 5er out to Seattle and went on an Alaska cruise and parked our truck and 5er in the cruise line parking lot, it was a reasonable fee and very convenient. We pulled right up to the terminal dropped off the wife and bags, she stood in line while I went and parked trailer and walked less than a football fields distance back to get in line with my wife. literally could have thrown a rock from the ship and hit trailer. Parking lot is right at the terminals and has security and is fenced, had NO problems, just reserve a parking spot when you book your tickets (they will need your length) have a great time.
Based on your description, I think you might be talking about a dock that was a tempory location and has since has been closed? They have moved to Bell Street Pier and Smith Cove (Pier 90/91).
So to the OP, if you are at Bell Street, there is barely parking for cars, nevermind an RV. If you are at Smith Cove, there is a much better chance of parking on site.
Either way, contact your cruise line and get a reservation!