We are having the reception on a cruise boat. It is a 3 hour cruise and I worry that if we fail to tell guest that the yacht will be away from the shore for that amount of time people will decide on the day of the wedding they can't commit to that amount of time (which I understand completely). Do we send out two RSVP cards or try to fit everything on one. Also, how much and what type of information should we send to the guests so they can be sure before they commit? The bride's father thought that we could send a card that held all the important information with a "tear away" RSVP card. I worry about fitting everything into the envelop and taking away from the invitation. Any and all input is appreciated. Thank you