I know that this is unrelated to hotels (sorry!), BUT, I've been noticing on weekends that Priceline has been offering flight plus rental car deals that are lower than airfare itself! I was skeptical, but last Saturday, I bit the bullet and took their deal, which was $850 for a name your own price flight August 20th-Sept 1st from Ottawa to Kahului PLUS a rental car, as opposed to $1050 for just the flight itself. I managed to score a great flight, and the rental car was from National. Hope this helps!