We will staying at Novotel Peace Beijing but want to go to Fragrant Hills Park?

How far is our hotel from Fragrant Hills Park and do we need to ask for a tour guide to make sure we see the recommended places inside the park. i already arranged for a land travel there thru our agent here in Manila but Fragrant Hills is not part of the itinerary. Please advise as i want to see the red autum leaves just in time for our arrival this Oct. 26. thanks a lot