I just took my class for my CCDW. The instructor went over the places you can and can’t carry for both CCDW and OC. I learned that with a CCDW I can carry in a GUN FREE SCHOOL ZONE (within the 1,000ft and even into the school), but while OC (without a CCDW) I can not. That I already knew and understood. What I didn’t know and don’t understand is that you can’t even drive past while OC (without a CCDW) if the road is within the 1,000ft line. How does someone (without a CCDW) get around legally while OC. There is nowhere in the state where you can get from point A to point B without driving through a GUN FREE SCHOOL ZONE.
I worried about this a lot when I first started carrying, before I got my CCDW. You're right, it's almost impossible to get around in DE without coming within 1000 feet of a school. Once I got used to open carrying I got over the fear of violating the GFSZA. DE cops aren't likely to enforce a Federal law, and unless you're doing something really stupid within a school zone they probably aren't going to bother you.
One thing I always tried to do was to never get out of my car with my gun when within 1000 feet of a school UNLESS I was on private property.