I am thinking about an end-of-August road trip to include Niagara Falls in CA. With kids (3 and 7 y.o.) how many days should I plan for at the destination - 2 or 3? I want to enjoy the nature views, and visit the tacky attractions minimally (although kids will need to be entertained...) Also, what hotel would you recommend to stay at that can be booked with SPG or Ultimate Rewards points? Any other tips would also be appreciated. TIA!