If you book on-line, even a room only is through WDTC. (Acting as if it is a package.) You may even get some free perk(s) with your res to make it into a package.
So if you are trying to book on-line, starting with a 2007 date, you are booking a 2007 package.
2007 packages are under the current way of paying -- nightly rates based on the day of arrival.
If you booked a res with a 2008 arrival, then that res would be a 2008 package with rates based on the new system of the daily rates.
If you want a room only, you may be better off just calling in.
HTH