alexn19 states /asks in relevant part: >>I see "floating" timeshares for rent, but how do I know if I could use those that week before renting?<< ============================================= In a floating week ownership, the owner has the option to reserve one week during the calendar year. In all likelihood, most float owners have already (long ago) reserved their 2008 week (there are, after all, now only about 18 weeks remaining in all of CY 2008).
My bet is that, at this late date, you probably have very little chance of renting a specific week (a holiday week, at that) in a specific location with (according to your post, anyhow) only 2 timeshare resorts, when your inquiry is made only about 12 weeks in advance of your specific week of interest --- **UNLESS** you happen to find an advertised rental which clearly indicates that this particular week is already reserved and is now being offered for rent by its' owner.
My suggestion would be to look up the two specific resorts you apparently already know about right here on RedWeek (use the gold colored "Timeshares for Rent or Sale" button above and walk through the geographic area selections). In so doing, you will very easily see if the week you want is being advertised for rent here. However, unless I'm mistaken, you can't actually view those listings at all unless you are a RedWeek member. It may well be worth the $12 expense to you to become a member, in order to see more information than you can see as a "guest" --- including the very specific info you require to obtain a clear answer to your inquiry.
You could also call the resorts directly, to see if any owners have put their units up for rent for that week through the resort. Be prepared that even if available, resort rental figures will ALWAYS be MUCH higher than renting from an owner.
You can also post a "Want to Rent" Redwish, identifiyng your specific week, geographic area, date and unit size requirements and see if you get any responses that way. There is a small fee to post Redwishes, however.
P.S. I don't work for RedWeek and I certainly don't care whether you join RedWeek. I'm not on commission --- I'm merely pointing out an avenue by which to see more information on this particular site than you are able to see if you are not actually a RedWeek member already. Good luck.
KC