The falls view is best from the Canadian side in my opinion, but both sides are worth seeing. We prefer the 4 Mile Creek State Park on the US side for camping, but there are several pretty nice parks on both sides if price is not a consideration. 4 Mile Creek is about 20 minutes from Niagara Falls State Park, and includes free entry to the falls park (but not the amenities). All you need for the dog is an up to date rabies shot record signed by the vet, although we were never asked for it. Over the years, we've found the Lewiston/Queenston bridge crossing to usually have the shortest wait times in either direction. You will need your passport or passport card (or enhanced drivers license for those from states/provinces that issue them). Lewiston/Queenston connects to I-190 and on to I-90 that will take you east towards Maine.
