Yeah, there should be copies available if you buy it at launch. Where I live, it's less likely to be available at gamestop, but I generally have more luck at best buy, but thats just me, it really depends on where you live too.
Yes you can I don't know how much will be available in your area but here are plenty of those bundles available. I didn't preorder it and just bought it in the store. But since I already have the wii motion plus I picked up the normal copy with the cd