It's hard for me to answer this will full confidence because there is no long term snowfall data for Herman. Reports out of there are spotty at best all season long.
I can say this about the area though. It has one big thing going in it's favor and that is elevation. It is located around 1670 feet above sea level, which puts it around 1070 feet above the lake. Just like in the mountains out west, the higher elevations generally see the heaviest snow.
With that said, when it comes to LES, the elevation advantage is like trying to squeeze blood from a turnip. That being because it is not in a primary LES area. Much like it's neighbors L'Anse and Baraga, the LES hits the highlands of the Keweenaw and gets squeezed out there, leaving not much for areas further downwind.
If I had to speculate, the 400" totals would be a real trick to achieve as they just do not get too much LES on a regular basis. However, that is just speculation.
I also do not have proof of this, but there are spots in the Keweenaw that are only about 100 feet lower than Herman is and I would guess their annual average is around 260-280, with record years over 400.
I can say this, if the Keweenaw were not there, the highlands of eastern Baraga and western Marquette counties could AVERAGE 300" a year (with record years being in the 500" range) and your's truly would be living there instead of the Keweenaw.
-John