Comparing that time to earlier march or early Feb doesn't help much, since that's right around easter---it will be hard to get a "great" deal during that time.
We have a full size presidents' week rental for something like $240, and that was after trying a variety of codes (but before the entertainment coupon---I didn't have one at the time, and haven't gotten around to rebooking.) For a ten-day holiday period rental, I'd say you may not be getting the best deal possible, but you aren't being gouged.