Define planning. It varies for us.
Our next trip is Dec 2006. Started deciding what we were going to do, where to stay March 2005. Didn't make ant ressie's till this month. We are also picking exact dates and thinking of where we want to stay for Oct. 2007 trip. In the past, we have done it in less time. We decided to do our May 2005 trip in Feb. 2005--found out I was pregnant and would be due the week we planned on returning. Started our Sept 2004 trip in August 2004.
We go every year for 10 days, so we buy APs and do two trips on the same pass. So we need to know how we are tentatively going to take the trips.