Hey,
Just thought of something else, may or may not be any help. There was a book that we used in training in Canada called "From the Ground Up". I was in the store the other day and saw that they have now released a US version of this, it is a good book and covers all the topics quite well and will have an Air-Law section that covers the US.
If you have a spare 30GBP may be worth having a see if you can order it. Just make sure you get the US version as otherwise yo will get the Canadian Air-Law and Met which is different.
Hope your planning for the trip is going well
Found a link for the book:
www.avidaviator.com/from_ground_up.html
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