Welcome, Boilerturf. You'll find a lot of great people with awesome information on this forum.
MHO also says not to waste your money with the dealer. Look into products such as 303, Rejex, The Solution or others. Minimal but regular applications will be all you should need.
Good luck with your Greystone. It's a very nice pick!
Hope to see you on the road or at the rally in June.
Rod