Neither Four Mile Creek nor Golden Hill have any full hookup sites. I could be wrong, but I believe the closest NY State park to Niagara Falls with some full hookup sites is Wellesley Island SP, about 250 driving miles from the falls.It appears that Four Mile Creek SP on the shore of Lake Ontario about 20 minutes north of the falls has campsites with power. There is a dump station, showers, water fill sites. Website is vague but no mention of full hookups. Shuttle bus to the falls.
Golden Hill SP is further east on the shore of the lake, and Has sites with: Accessible, Electric Hookup(50), Water Hookup, No mention of sewer at sites.
There are several other SP in the area but no campgrounds.
Charles