Of coursejsk wrote: bringing a printout of those policies also will be more helpful in the case of a misinformed agent rather than just saying you spoke to somebody on the phone who told you so-and-so.


And no one suggested talking with a airline rep and not getting so much as a name and duty position



Again, still, what is written on a web site and policy else where is only as good as the PERSON interpreting those words at the counter when you check in.
The suggestion is.... TALK with the people at that counter or airline at that airport, of course get a name and duty position so you can reference later (really, is anyone silly enough to walk in and say "I want to take my gun and somebody I spoke to said it was ok"

You should have no issue after doing this.. every time I've had a hiccup at the counter or TSA these simple items and suggestions have allowed me to get though the process in very little time..Never being held or denied.
I hope it goes just as easy for the OP.