My advice - do not take the winter night tour because if you don't get a seat in the first level this company does not care - they will fill also the uncovered second level. I paid for US227 for us to get frozen.
The tour was magnificent! We travelled with our two grandchildren and were reluctant to take the night tour thinking they
would fall asleep after a day of touring. We booked it because we had taken the same tour years ago and wanted them to experience DC at night. Much to our surprise they were wide awake. They were amazed at the sights and took many pics with their cameras. Best tour they took while in DC. A must see, you wont be disappointed!
This trip is well worth taking but, even at two hours, is a bit of a rush for keen photographers. More time would have been appreciated at the Lincoln Memorial.