sbeehre, are your smelts the same as ours - small, predatory esturial fish..?
I ask out of interest as they're a deadly bait on a couple of waters I fish but hard to come by in a decent size these days.
Ours have a very distinctive cucumber-like smell to them, much more pronounced if you can get them fresh as opposed to frozen.
A lot of us rely on deadbaits in the winter for much of our fishing, sea baits are favoured over here because they have a much stronger scent.