We went to Niagara Falls in October and also stayed at the Embassy Suites Fallsview. We had booked the horseshoe falls view, but we were given a complimentary upgrade to a room with a view of both falls. We were on the 14th floor and had beautiful views! Considering it was misting rain most of the time we were there, some of our best pictures were made out of our hotel window on the day we arrived - there was a break in the rain!
I purchased our Adventure Passes from AAA before we left. They were $45 for adults, so we saved $3/person. We could've saved a few dollars by purchasing separately (we probably would've skipped Niagara's Fury), BUT the most wonderful benefit to having the Adventure Pass was that we could ride the shuttle! Did I mention that it was rainy while we were there? We rode the shuttle to the end, just to warm up and see some sites without walking in the rain.
We ate dinner at the Skylon Tower and it was soooo worth it! The food was good too. We ate in the rotating dining room instead of the buffet. There is an early seating special that is a set price and includes salad, entree, and dessert. It was quite a bit less than paying a la carte later in the evening. They have a website where you can check out menus, prices, and make reservations.
We ate breakfast daily in the hotel. We made a point to get there pretty early to avoid the crowds. They give you info upon check in that estimates the crowd level for different times of the morning. The hotel is also in easy walking distance of the casino. We ate dinner at Johnny Rockets in the casino food court our first night there.
One thing that really amazed me about the town was the beautiful gardens/flowers everywhere! My husband made the comment, "It looks like the Canadian pavilion at Epcot!" It was lovely!
We spent a couple of hours on the US side before crossing over into Canada. The state park itself is nice. There's a nice visitors' center. We paid the $1/person to go onto the observation deck and down the elevator to the stairs that go up beside the falls. Other than the state park, though, I was disappointed and embarrassed by how cheap and cheesy everything on the US side looked! We wanted a fast food place to eat lunch, but there was none! Only an "international food court" which was freezing cold and nasty! There is an abundance of restaurants on the Canadian side.
Of the attractions on our Adventure Pass, our favorite (other than the bus!) was Maid of the Mist. It was breathtaking! The Journey Behind the Falls was ok, but not awesome. Also, if you buy your pass through AAA, you get a coupon for 10% off at any of the park operated gift shops.
Have fun planning and a wonderful trip!