You can try...
However, as Christmas is a highly demanded week, most owners that aren't going will rent theirs for $$$$, rather than deposit it with a trade company.
Same for New Years, Easter, Holy Week, and most of July.
If you already own a RI week, you can certainly put in a search, but please don't purchase one expecting to trade into a Holiday week @ any of the Royals.
fwiw,
Greg
if you wanted to be able to trade into the royal sands 2 bedroom
christmas week
would A royal islander/2 bedroom/lock off
Weeks #1=#12
be highly likely to accomplish this trade