Poly Top Butte is a good second summit to add on a trip to China Hat W7O/CE-053. Here’s a few notes from my activation:

Camel Hump is a summit out of St. Regis, Montana on the Interstate 90. From St. Regis you have about a 7 mile drive on paved roads, then about a 6.5 mile drive up Forest Service road 3800. At that point you encounter a closed gate but it's an easy 1 mile walk to the summit from here. Please refer to my saved map in the link below. You do not need a four wheel drive on this road, any car can make it easily.