On the course I wouldn't actually change anything. However, in the club house I'd like to change the rules on jeans and trainers.
Its quite funny, we allow jeans in our clubhouse and I'm still yet to see anyone change into them after a round of golf, I can't see anyone doing it unless you are going straight out and showering after your round, but how many of you do that as well :mmm:
I think the jeans rule changing was more an attempt to get members when not playing to be able to drop in to the club for a meal or drink when passing, not sure of its impact, still never seen anyone wearing them!
As for the OP, I'd wear pretty much the same as I do, I think I would even find cargo shorts restrictive if not a little heavy, lightweight specific golfing attire is just splendid old chaps :smirk: