Why don't you make PS for Blue Bayou one meal, and try something else another meal? Who knows if BB is really going down during the PotC refurb. if it's not, and the Bayou scene is intact, you really can't beat it for atmosphere, although the food isn't great. It's really fun and neat. But then, you could also make PS's for another day, and you can cancel either at the last minute if you just don't feel like it or your plans change.
If you were considering Hook's Point, you might want to think about Storyteller's in the GCH instead. I've heard only good stuff about it. Delicious food, excellent service, and you can wander around in the GCH lobby before or after and enjoy the gorgeous ambiance, and the big fireplace. You might even want to do a character breakfast there; I've heard it's really nice and kind of low key (the characters are good about not being intrusive if your 17 y.o. is less than thrilled with hugs from Koda and Kenai) and yet would be fun for the 6 y.o. We didn't do it, but that's because my kids are a bit freaked out by characters (well, the DD6 is, the older two think it's for babies. Silly girls!).