Not to be a Debbie Downer, but I would only do it if you are willing to get there super early Saturday morning. Disneyland annual passholders are nuts about new rides (or re-opening of rides). The line is going to be huge. If you aren't willing to wait in a really long line then it's a pointless trip. You might be OK Friday early afternoon, but once people get off of work it will be a nightmare.
I think I have DH convinced that we would need to stay Saturday night as well in order to have one full day (just for FP timing.) We only have enough hotel points for one night, so he is researching hotels, but it looks like max spend on that would be $180 or so, not bad for two nights and a flight to DL. Eek!
I want to try and surprise Finley, but DH is insisting I bring the stroller, which means I would haul it to Aspen next week and she would know something was up.
I'm thinking that if you get there early and all the other passes are blacked out you might be okay. If you can swing a resort hotel you can do the early magic hour!