Burlington County? Next time I'm in the Lima/Media area, I'll have to check that out (it was never one of my favorite systems to program). Then again, you'd probably get only one of the sites from that system; it's a weird system compared to other county TRS networks.
Well, if you can pick up Burlington County from there, you should be able to get the NJ State Police system as well.
RE: Delaware - the odd thing is I can get a faint signal outside my house (I live just north of "Uptown" West Chester), but when I get into my house, no signal. Guess I'll have to move in the future...
Chester County - reportedly, the latest rumor that I've heard is that they'll likely stick with the EFJunk system, but upgrade to digital; hopefully, the simulcast freqs will be P25 so there's an outside chance of those freqs being monitorable; the LTR Multi-Net system, as I've noted several times before can't be monitored as a LTR trunked system, but the freqs can be monitored in conventional format - you'll miss some xmits, but still have a halfway decent idea as to what's going on. Now, if the county decides that EFJ's new radios aren't up to standards, then there's the chance they could switch systems (ie. Moto Astro or P25 Standard), but the latest word that I'm hearing is that, as of a few months ago, they were testing a new set of radios for a potential upgrade. We shall see what happens...
AFA Salem County, I think funding may be a big sticking point as to why they're still analog. The few times I've monitored that system (usually from the Wilmington/Claymont area along the riverfront), there wasn't much action.