Fess Parker Doubletree or Four Seasons Biltmore would both be wonderful, but they will cost you and UR can't get them (well, you can just pay with them for 1.25 cents/pt).
There's a Courtyard Marriott in Goleta (about a 10-15 minute drive from downtown Santa Barbara) but looks like they have a 3 night minimum. Brand new hotel, and they're nuts!
It's a shame there's not enough time left to do it, my recommendation woulda been getting the Citi Hilton Reserve and using the two free weekend nights for the Fess Parker.
There's a Holiday Inn Express and Hotel Indigo available for 40k/35k IHG/Priority Club points per night. Crowne Plaza in Ventura is nice for 25k points/nt but it's about a half hour drive.