Buck makes some fine knives. I’ve always loved them and own more than a few.
However, that SYKCO 411 is something you don’t see everyday. They are made by one of the best knife companies in the business IMO.
First off, they have a lifetime warranty (you break it, they replace it. Forever). They call the blade steel SR101. It’s basically 52100 ball bearing steel with a very good proprietary heat treatment.
The handle is made from a material called respirine C. It’s not spongy like rubber or kraton, but it has some give to it. It’s very comfortable on the hands.
The bottom line is, I think it would be an excellent camp knife for a lady who says 3” isn’t enough (shouldn’t they all say that?

), and it’s probably top tier for your budget.
They’re not huge, but they’re not tiny. They are made well from top quality materials. They are certainly more unique than many knives out there, and that may make it special to your wife.
The reason I said “I’m sorry” is because once you have held a Busse or kin (Scrapyard and Swamp Rat), you will crave more.
You’ll thank me. And curse the day you read these words.