Hi Leopard Lupus
I can understand the appreciation of using primes. As you've indicated you'll be using a full frame (5D mk II) - if it were 2 of your primes lenses to take, I would probably take the 35mm and 135mm from your collection, OR the 35mm and 85mm. As others have already indicated, it mainly depends on a) your photographic style (and interest) as well as b) your intended location (ok... you've now written California, but what part - city, rural, mountain, seaside, etc).
At the same time, if it was just 1 lens, I'd probably either take just the 35mm or the 50mm. Depends depends. I echo what was previously written - 'relaxxxx... you're on a holiday'. Perhaps the 50mm helps being close to the 'natural eye' equivalent in that regard. But it's hard when you want to go wider...
FWIW, I've just come back from a short holiday interstate to Western Australia - and visited friends in Perth and nearby. I captured various types of photos (city scape scenes, parks, flower details, children of friends, random animals). I took the 15-85mm zoom on my 7D. While the optical quality of a zoom is not quite there with an L prime (but it's about the same as most L zooms) - the convenience and flexibility it provides (equivalent from 24mm to 136mm in FF format) were invaluable to me.
When I was in Thailand last year (from seaside Phuket to Bangkok days after the red-shirts protest escalated / ended) - my 15-85mm zoom was my most used lens. January this year I went interstate to visit my family and too k my 15-85mm zoom and my 100mm USM macro (for portraits). I don't think I'll ever travel without a zoom... it's just too 'handy' for my needs while travelling (keeping 1 lens on all the time - that's why I have basically decided to do a 1 body, 1 zoom kit for nearly all my 'general' travels).
Best wishes for your decision.