HBP without a presale??

[amis917]

I am an idoit! Because I put things off until it's too late, I didn't 
get a HBP presale at any of the local stores. Now, aparently, it's too 
late. I was sure they'd presale until the last minute. That's not true. 
If I order it today from Amazon.com it'll still come in the mail on the 
16th. It's coming USPS though - and my mail doesn't arrive until around 
5pm. Are stores going to sell out? I could go on the morning of the 
16th and buy my copy, but if there aren't going to be any - I'll order 
it online today. I don't know what to do! Any advice??