That's a really small bear can for ten days. Either you really don't eat much, are eating power bars, or you're overestimating what you can get in the canister. You also have to pack hygiene items and trash in it (but not first day of food). Consider renting a Bearikade, either the weekender or expedition size will weigh about the same as the Bearvault solo and give you a lot more room. You can get it by mail from the manufacturer and return it the same way.
I'd add a small foam pad to go under the NeoAir, as it can get pretty cold in shoulder seasons. I don't know what your comfort level in cold is, but I wouldn't be hiking in shorts, and I would be taking midweight bottoms and expedition weight top base layer, and I'd be sure the rain layer is big enough to fit over the down jacket without compressing it much. It can either be nice, in the 60s or 70s, or it can be chilly and windy and brisk - the weather changed a lot last weekend over the course of two days, for ten days I'd have zipoffs and an extra long sleeve layer, but that's me - I also have hiking buddies who ski in shorts, so definitely YMMV.
That three liter hoser is overkill, I've never had to take more than two liters and in some areas you can get away with one between water sources. It's late in the season, but you're going to be hiking from lake to lake.
I'd also be taking chains or cables for the car. Just in case.
Rae Lakes is a gorgeous area. Have fun on your trip!