I always just google "hilton mvp" and it's one of the first few links. if you want to register for the promotion (get gold status with 4 stays within 90 days), go here:
https://www.hhonors.com/landingpages/mvp.aspx
Otherwise just go to:
www.hiltonfamilymvp.com
On the landing page you can log in up top with your info. You'll get a dumbed down version of the Hilton site where it shows upcoming reservation at the bottom, and previous stays on the left. You can use this page to search for reservations and it will automatically look for the MVP rate. It's not always available, but it's always worth a look. You can also put in your AAA or other info, and it will show all the available rates in a list for you to compare.
I do not know if you have to be registered for the promotion to be able to log into and use the
www.hiltonfamilymvp.com site. I do know that anyone, even Diamond members, can use the codes to get the MVP rate.
Book Your Next Reservation Today
Once you have your HHonors account number and have selected your 90 day period Book Online to automatically receive the MVP discount. Or, you may book by calling Hilton Reservations and Customer Care at 1-866-424-4276 or by calling the hotel directly. When making reservations by phone, please identify yourself as an MVP traveler and provide the MVP corporate number for the Hilton Family brand of hotels as follows:
Hampton®, Doubletree® and Embassy Suites® hotels use corporate ID: 0560041604
Hilton®, Hilton Garden Inn® hotels and at select U.S. Hilton Grand Vacations Club® locations use corporate ID: N0041604