No kids. I told my wife that if I go before her she should donate all my guns that she doesn't want to the NRA for their fund raising auctions. She won't need the money from selling them so this is an easy way to get rid of them without the hassle of dealing with individual buyers, etc. It's in the will as well in the event both of us go at the same time.
Regarding leaving items family: After my father passed, my mother told all three of us kids that we should go through the house and put a sticker with our name on it on the items we wanted after she passed or if she needed to move into a smaller place. We also made a list that each of us had a copy of. The items included artwork, furniture, her jewelry, my fathers guns and watches as well as other stuff. She told us that if there were items that more than one kid wanted we should work it out among ourselves and if we couldn't the oldest kid got first choice. Her stuff and her rules and she made us all agree to these rules so there wouldn't end up bad blood over something silly. It all worked out great and when she passed there was no issue about dividing up her possessions. I was her executor and it made the job much easier not having to arbitrate as to who got what.