You can certainly sign up anytime you want. When you put in the info for you AVP, you can put in the dates that you will most likey go. If that changes, you can also change your AVP. Once you have access to the site, you can view the information for every month, however, you will only be granted access to your specific month's discussion forum (in addition to all of the general forums). If you change months, you will then be granted access to the new month's discussion forums. I have not used TGMike for the week of T-giving, but I have used his advice and touring plans over Memorial Day, 4th of July, week after T-giving and first week of Dec. I find his advice to be dead on. I am planning on using his service again for our trip in March 2007. HTH