There is no reason to play silly games here and the rules are clear. You must declare anything you bought overseas and are importing into the US. Period. Items 1+ year old are not dutiable, but this does not mean not reportable.

If you can't remember whether you bought something in the US, declare it as it's not dutiable at 1+ years old.

This leaves you with the last year's stuff which you can categorize and will be well within your duty free limit.

Easiest here is to do a paper declaration. But, you can do GE and simply explain when you are diverted to a CBP Officer.

As a GE-holder, it is truly folly to do anything but err on the side of caution. All it takes is one Officer having a bad day and your GE summarily revoked. And, for what? You're not going to be liable for duty anyway.