We visited the Nautilis museum and the nuclear submarine on a rainy Saturday afternoon in June, 2006. There were no crowds and no wait to get onto the submarine. The admission price is free. They do ask for a donation and that you exit through the gift shop, but for the admission price I thought it was tastefully done. My two year old liked looking through the periscopes. It only took 2 hours to go through the entire museum, but you can go at your own pace and take longer if you like. There are volunteers (some veterans) in different areas of the museum to answer any questions you may have. The submarine is a self paced walking tour. There is an audible guide using a hand held receiver. This voice guide can be set to 4 different languages and changes when you enter another chamber of the submarine (sleeping quarters, torpedo room, etc.). I didn't feel claustrophobic, but it may not be for everyone. Their website (http://www.ussnautilus.org) was really helpful too. Overall, I thought it was worthwhile.