Need opinion on walking v.s. playing disc golf

At 50 years old I use walking as my main weight loss tool. I've taken up disc golf, but since there is no disc golf listed in the exercises, I need to use something as close as possible to it. Disc golf consists of walking around, carrying a bag of discs, around 12 discs. (Sport frisbees). We play 18 holes. Typical games take anywhere from 1-2 hours and you're on your feet, walking the entire time except when you're throwing your disc. Terrain is usually a mixture of dirt and grass. Elevation changes is typical, sometimes walking up/down small to medium sized hills. You're constantly walking over/around rocks, sticks, tall grass, etc, etc. So it's not just a smooth walk on concrete, etc.

I've been entering the time spent playing disc golf as walking slowly at 2.0 speed. The problem is, I can walk an hour at 2.0 and not really get sweaty. but playing disc golf for an hour I always work up a good sweat. So, do you think I should stick to entering it at 2.0 walking or perhaps go up to 2.5 or 3.0 walking? Thanks for your thoughts.