I think you should. Last year, I got a 4BR/3BA with a screened pool in a gated community for $480/wk total.
Basically, what I did is sent out a request for a quote to all the houses that met my requirements on
www.vrbo.com (after checking out their availability calendars). I told them that I was looking for discounted last minute pricing and that if they would be interested in sending me a quote, I would be happy to look at it. If you don't do that, some will send you high offers and act like you're lucky to find a place at the last minute.
I got LOTS of offers (had a Windsor Hills townhouse with a splash pool offer for even less).
I did require that they accept credit cards (for my protection).
Good luck!