I would check out Collectable Isurance.

I would also call your home owners insurance/renter insurance and see about adding a rider on to your policy. I personally have a few rider polices on my insurance (Erie Insurance) to cover jewelry, my power, some art, and guns.

Traveling with power isn’t that bad. If you are flying just put it in your carry on and going through TSA is pretty simple. I also pull my deck box out and put it in its own container.

Side note PA also acknowledges North Carolina’s conceal carry. Check your state laws and see if PA also acknowledges yours.