Yes, I think that's your only option. [Specifics deleted.]
It would be really nice if there was a way for Tuggers to advertise that they had x number of SOs left, so that they could try and match up with folks who'd like to rent a day or two at any Starwood resort -- say for a weekend stay or to piggyback onto an existing weekly reservation. (This assumes renting SOs are okay, which is another topic.)
I know the Hawaii board regularly has a people asking for advice on where to stay for a night or two until their timeshare check-in or after their timeshare check-out. It'd be nice to be able to direct them to the Tug Marketplace to see if anyone has leftover SOs that they could try and book a studio or 1 bdrm at WKORV as an alternative to staying at the CourtYard. I know I'd take advantage of such a thing, provided the price was reasonable.
I know reservations would be limited to 90 days out, and peak periods might be hard to fulfill, but it'd rather try that than letting them go unused. I know some people rent 2 or 3 days on Redweek, but that's an expensive proposition because ads are $65 and I wouldn't be asking more than a $100 a night for a studio.
Unfortunately, I don't think that the current Marketplace has capacity to market unused SOs. I think they're only for specific resorts. But it'd be a great thing to have. (Hi Tug Brian!)