I went out there around noon on Saturday after the fog lifted a bit. We ended up casting since I saw what you did. Spotty fish on the outskirts of that big pack. We did find pockets of fish in the pack. Didn't have much time so we only fished for about 2 1/2 hours. Just me and the misses. Got 2 keepers, two 14" shorts, lost a nice one at the boat. Buddy of mine is a charter captain and fished somewhere up the middle and limited by 2pm. So they were there.

And for what it's worth, I generally avoid packs. Especially for perch fishing. I don't know how those perch packs form but 90% of the time if I get sucked into one I mark nothing and see no fish going over the sides.