Just a side note on lights. I use battery powered taillights instead of dynamo for several reasons. When I flip the switch on the light to power the USB charger instead of the light, my taillight would be off, but on overcast days I like to run taillight during the day. Thus, if I want to use my USB charger and taillight at the same time, it has to be battery powered. Most of my touring is in places where flashing taillights are legal, thus I usually use flashing mode when I use the taillight during daytime. But, the dynamo powered lights I have looked at are only available in constant on mode, not flash mode. And the last reason is unique to me, not you, I have an S&S bike and I do not want to deal with the wiring issues when I disassemble and reassemble the bike. But, if you would rather go with the convenience of no batteries to worry about, get one of the lights you are looking at.

I try to get at least 10mm of clearance between fenders and tire, more if frame allows. Front is more critical than rear, if you get something stuck in the front, you could go over the bars. But the rear, you would likely just put a flat spot on your tire tread. Knobby tires are more likely to pick up something that could jam between the fender and tire, but I assume you are not using knobby tires on your bike.