Hi Kenh,
Welcome to the Heartland Owners Forum. You'll find a lot of useful information here along with a great group of people who are happy to share their knowledge and experience.
The Heartland website shows the 2950RK pin weight as 2268, which of course if for the base RV coming off the manufacturing line. The actual pin weight will vary a lot depending on what options you get, how much gear you carry, and whether there's water in the holding tanks, particularly the ones toward the front.
As a rule of thumb, you could plan on around 20% of the GVWR being on the hitch. So for planning purposes, with a GVWR of 14,000, you could assume the pin weight of a fully loaded coach could run around 2800 pounds. You could give yourself a little margin and plan for as much as 3000.