My wife and I did the last half of the 35 day Voyage of the Vikings . We embarked in Rotterdam and disembarked close to where we live in Boston. We weren't sure we could do the full 35 days but we had such a good time that 35 days would have been great.
We flew to Amsterdam and stayed at the Banks Mansion Hotel for three days. I would highly recommend this hotel and the stay in Amsterdam was one on the highlights of our vacation.
We took a taxi back to Amsterdam's airport and we were promptly met by Hal representatives who put us on a bus to Rotterdam where we embarked the Maasdam at noontime without any delays or problems.