We will be arriving Niagara Falls US side, around 3:00 PM on September 4th. We will be leaving the next day around 2:00 PM. Would we have enough time on the 4th to do Cave of the Winds that afternoon and see some of the park? The next morning we planned on doing Maid of the Mist. We're hoping it won't be too crowded that time of year. Also, can we walk across Rainbow bridge and get back into US side with a drivers license and birth certificate? Passports are $99 per/person and we might not even use them again.
Thanks for any info you can give.