There always seems to be less availability in Club nowadays compared to First. And there is no guarantee extra seats will open up. If you're headed around the SFO area have you checked Club seats there?

Though for an extra 25,000 miles for two I'd go in First, but I'd rather do it there than back. But if only First is available then you have very little choice if you want to use the 241. Well there's always WT+ I guess!