If you are registered for NNGC you should have received via email a package of info about the layout tours which is really usefull for planning. It does not include specific address info, but does include geographical groupings, and days open. A plan made from this info will only leave you with entering the specific address data which you should receive when you sign in at the convention.
If you are registered and did not receive the info package, contact the registrar who's contact info is on the website.
Hope this helps,
Dave Adams