But that's part of the point. It's a bit like racing in the rain. In a motorhome, conservation of momentum is everything. You've seen it a million times with semi-trucks. You can't just put it in cruise control and expect to ignore the terrain.
Big hills require more momentum than small hills.
But the small and medium-size hills offer an interesting challenge. Nearing the top, you play with the throttle, because you don't need to go over the crest at full bore. You'll naturally start gaining speed again on the downhill run, and the last thing you want to have to do is touch the brakes. And you begin to anticipate traffic up ahead for the same reason. You don't want to have to stomp on the binders to avoid ramming the back of somebody's Mustang.