I think the "above the normal high camps" rule really means "beyond the normal high camps". In other words, if you traverse across the glaciers beyond either Muir or Schurman (regardless of elevation), you're probably supposed to pay the fee too. For example if you ski Paradise-to-White River traverse or the Foss-Molenaar high level orbit, you should probably register and pay the fee. For some reason, I keep breaking this rule. You are unlikely to get caught doing this, as long as the rangers stationed at the high camps don't see you coming or going, but if you needed a rescue, it wouldn't look good.
