I suspect it varies from region to region. Around here, dealing with Ohio Dept of Natural Resources and NFS offices usually yields good, reliable advice. Perhaps it's because our trail systems aren't as long or numerous, or as subject to sudden and severe weather impact - it's probably easier for them to stay current when there's not as much data to deal with. I've also found they're very forthcoming about saying "I don't know" when they don't know, and that they'll then try to connect you with someone who does (or arrange to relay information once they find out.)