Cache series I found on Saturday were "Constitution drive" and "WPP". These were along the driveway to and on a trail in Walking Purchase Park, just across the river from the breakfast event. After that, I got some of the "urban" series, which is scattered all over Allentown. There are more than enough geocaches remaining for a second and even a third trip to Lehigh Valley.
On Sunday, I started geocaching in and around Quakertown. The last few times I was in this area, I got there in the evening, so there were some daytime-only geocaches that I wasn't able to visit. I got those on Sunday. After that, I went to Richland, Coopersburg, and Central Valley, almost to Allentown again. I also visited the campuses of DeSales and Penn State Lehigh Valley. It's interesting that these schools now have geocaching clubs and workshops.