That sounds about right. Those are icy courses so you should get quite a bit of pang via overdrive bonus by driving your tee shots onto the ice with topspin. The bouncing can really carry the ball some ridiculous distances. Also, since they're a couple of the easier courses, you'll get a moderate amount for making birdies and nice approach shots.
The idea behind doing tourney is that you can play a lot more holes in a given period of time since you don't have to wait for other players to take their shots.
But recently I've just been doing tourneys on courses I don't have an 18-hole record for yet. If you set a new personal record for a full course, you get a 1000 pang bonus, which is how I got about 9000 pang in one day without too much effort.