I have a similar setup for my maple trees, my equipment is going on 5 or 6 seasons. Clean the tubing and taps well at the end, and if you stack buckets make sure they are dry and add a piece of scrap
wood or something to the bottom to separate them so they don't get stuck together.
I also tap silver maples, I would actually say the flavor is better than sugar maples personally, lighter, more honeylike. I've done walnut syrup before, the ration is much higher, close to 1:100 I would guess, and the flavor was ok, not special. Almost like a dark maple syrup with an off taste. I got maybe a few ounces from 10 gallons.
I might suggest you check the depth of your taps into the tree if it doesn't flow, they look a little deep to me.
Good Luck! We're flowing in MN now too, earliest i've ever seen it personally, though I said that last year too.