I will be visiting Paris in about three weeks and, of course, would like to visit the Eiffel Tower. The Eiffel Tower website is sold out of tickets. Does that mean I will not, in any way, be able to enter the tower? Can I just wait in line for a ticket or would it be best to buy tickets for a tour (i.e., Easy Pass Tours paris.easypasstours.com)?? If I wait in line, any suggestions on what time to be there to get ahead of the crowd??