HI John - I did this walk on the 4th of July from within the park and I can confirm that it’s currently very clear. I cut straight up from Cronans Creek campsite to the ridgeline but that was a mistake. There’s lots of loose earth and rock once the slope steepens, it’s nearly impossible not to dislodge large chunks and once they start rolling they don’t stop untill they get to the creek bed. So I’d stick to the route you scouted along the property boundary.
I didn’t see anyone beyond the campsite (and it was a peak season Saturday with great weather). There’s a small peak not far into the climb that’s not apparent from the topo maps and the perspective from there makes the trail forward look intimidating, but the southern side of the ridge can be ascended by scrambling (not walking). The north side is flat rock and a long fall. The crest of that section gets exposed towards the end - once it turned to bare rock I descended through the bush to get around it. After that the way is broad and forested.
Took me ten hours yellow pinch to yellow pinch in exploring mode. It was good fun.