I live in Washington Crossing, just north of Yardley (so I presume you might end up here, as well).
Where I am (Upper Makefield Township) the school district is Council Rock, ranked as one of the best in the state. Yardley, however, is in Lower Makefield Township, which is part of the Pennsbury School District, which while not as highly ranked as Council Rock, is also a good school system.
As rugby pointed out, CCW is not an issue, and for C3 signoff, just schedule an appointment with the County Sheriff to make sure he's in his office the day you want your Form 4 signed.
I've never had an issue with any of the local LEO's; the departments are all rather small and their primary responsibility and activity is traffic enforcement. Like lots of little departments, they will rarely ticket a local unless you are blatnent about a traffic offense.
Property values here are increasing rapidly. 3 years ago the cheapest house in my neighborhood (private road, 8 houses on 18 acres) sold for $350,000. It's currently on the market for $650,000.
Feel free to IM me or email me directly with any specific questions. If you'd like a tour guide, let me know. I'm self-employed and my schedule is flexible. It would be nice to have another arfcomer in the area to drag to the range