LOVING this trip report!
I can't believe the Maid of the Mist doesn't sail from Canada any more! We rode it just a couple of years ago. Well, two of us did; DD refused since the first time she rode it (around age 10?) the closer we got to the falls, she kept telling me she was going to barf. That thing really rocks! Well, we were on the upper deck - I looked down and saw everyone wearing their ponchos and the "mist" was pelting everyone like it was coming from a fire hose so I politely told her to go right ahead. She didn't, but she also vowed NEVER to ride it again.
Funny story on the more recent ride- we were driving out to see the Floral Clock (2nd most photographed site it all of Canada! Behind the Falls themselves!) right from the MotM ride and our feet were soaked, so we changed into sandals. After visiting the completely deserted Floral Clock
(Not a soul in sight. Who's taking all these pictures? You Canadians are weird) we got back into the hot car and it REEKED. Like following a zombie garbage truck. In July. And August. Yuck. It took us a while to find the odor- it was our Mist-covered socks, which I promptly tossed in the nearby trash can. And they say not to swim in the Florida waterways!
In your photo of the Bridal Veil Falls there's a bunch of decking at the bottom. This is our all-time favorite Niagara experience- the Cave of the Winds tour. And not just because you get free sandals! (We've got multiple pairs at home, which my DH proudly wears in the summer. Yes, they are plastic and say "Cave of the Winds" on them.) There used to be a cave (before it fell in) but now you just walk up and down the wet decking (hence the provided shoes) and let the falls blow all over you. The aptly named Hurricane Deck is a hoot. Highly recommended. Another poncho experience.
One final note- you say you tried Dunkin' Donuts. By eating a donut.

As a Rhode Islander (our state has the highest per-capita Dunkins' in the nation) I feel qualified to tell you this: nobody goes to Dunkin Donuts for the donuts. You go for the coffee!!!!!!! Although I am proud to say a few Krispy Kreme's tried to get into the market and were promptly run out of town, so maybe a FEW of us eat the donuts.