Posssession with an expired LTC is NOT a criminal offense (look it up), at most it is strictly a $$ fine! And it is not usually enforced except if the person talks themselves into it or a PD has a hair across their ass for you.
While OP needed advice, I think it's arguable that he's gonna talk himself into trouble.
If so, his minimum prep work is for a friend to come over and borrow all the guns,
all the ammo, all the magazines,
and quite possibly all of the accessories like scopes, gun cases, etc.
To
come over, because
if OP can't keep his mouth shut,
a simple "I drove my guns over to my friend's house"
instead of "someone came to my house and borrowed my guns"
is enough to get the trouble started.
And if OP can't keep from talking himself into trouble,
having a buddy from a free state come over to borrow them,
is even better.
ETA: Bad advice; interstate loans must be for sporting porpoises.
Here's a Field Loquaciousness Test.
If OP can watch the entire video,
and at
no time feel the urge to Answer Questions,
then he may be good to go.
If at any point OP feels an irresistible compulsion to Answer a Question,
then stop screwing around and have some individual take 'em out of state.
ETA:
The point is not to act like an idiot when submitting the renewal.
The point is not even to stonewall random questions during the process.
The point is to STFU and not volunteer info to screw yourself.
It's a powerful compulsion for anyone.
Situational awareness is key.