If possible I would give Cedar Point 2 days, it is a very BIG park, and though it advertises that it has 17 roller coasters, it also has many attractions for families. (including 3 childrens areas).
Like with Disney it is beneficial to try to get there as early as possible, I believe the park opens at 10AM (check
www.cedarpoint.com), but usually the gates will open about 30 mintutes prior to non-resort guests, the midway will be open usually up to the midway carousel.
Definitly become aquainted with the park before going, if you or your family want to hit the "headliners" Maverick, Top Thrill Dragster, Millinium Force, and Raptor make sure you make those a priority and hit them in the morning 1st thing.
If they are you might want to look into staying at a Cedar Point hotel, Breakers is the best, its not to bad as far as price and is an easy walk to the back entrance of Cedar Point (right by maverick). It has a nice beach on Lake Erie. It could stand some updates but its clean. Keep in mind when looking at price that you dont pay parking at Breakers, as you walk to the park.
Also with Any Cedar Point resort (Breakers, Breakers Express, Sandcastle Suites, Castaway Bay,
Lighthouse Point, and Campers Village) you get early entry to Cedar Point. Basically you get into the park 30 mins early to ride the super headliners, Raptor, Millinium Force and Top Thrill Dragster are usually on the list.
Beside the roller coasters some of the best family rides in my mind at Cedar Point, are the Derby Racer (a fast version of the carousel), Skyway and Gemini. Don't overlook Gemini its old but its still lots of fun!
Last on tickets, see if you live near a Cedar Fair park (
www.cedarfair.com), it might be worth it to look into their platinum pass which gets you entry and free parking to ANY Cedar Fair park, includin Cedar Point. Its a fairly long list, and also includes Canada's Wonderland in Toronto, Ontario.
BTW, if you are looking for a good hotel by Niagara Falls I HIGHLY recommend the COuntry Inn and Suites on the Canada side, wonderful service, clean hotel, good prices!
Jennifer