Our experience is sometimes they ask, sometimes they don’t. Wait until they ask. Do not volunteer information. Have your list ready just in case. We had an agent on the phone once who said “did I ask you that?” after Jerry started reading our list of spirits. He said don’t say anything unless I ask about it.
I usually add a few partial bottles in the list to emphasize we are using it. We have heard about them rejecting the idea of bar stock, but it all depends on who you talk to. Every crossing is different, every agent has their own way, but we didn’t see any differences this year. When we crossed back into the US into AK last month it was just using the phone app, and we got our approval without talking to anyone. We do have Nexus, which makes it easier.
Bottom line – Our crossings this year so far were easy.