Narrowed it down to Alderbrook, Port Ludlow or Tulalip for the weekend. Alderbrook and Port Ludlow would be two-nighters (one just the two of us and one with the kids after we pick them up). Tulalip would be one night only. It's for our anniversary, a weekend without the kids, DH's birthday and the heck of it.
I voted for Port Ludlow since I've never been to Alderbrook, but really would vote for one of the two where you can stay 2 nights. I feel like you'll be more relaxed after 2 nights, even going to get the girls and bringing them back.
After much, well some, deliberation, I called and made the reservations for Alderbrook. I think it has more to do on-site and even with the extra time to get the girls they'll enjoy it more. And since their swimsuits will be packed from their visit with Grandpa B, it would be darn convenient to have the pool.