Great destination if you want to “escape”
I visited Rock Island on 8/12/23, during the peak Perseid meteor shower viewing period. Rock island SP is a dark sky spot and combine that with lesser people around, it was a perfect location for stargazing!
About the site(20): Very spacious but the distance btw the picnic table/tent and the fire ring was somewhat far. Can see the neighbors but far enough to maintain some privacy. A short walk to the beach! There are sites that are closer to the water (i think 26-28) and i would definitely stay in one of those sites next time.
Island in general: Like many people mentioned, there’s a water pump near the boat house and pit toilets scattered thru the campsites. Firewood are sold for $7/bundle during 4:30pm-5:30pm. Bring cash!!
One big no-no: SPIDERS. WHY SO MANY SPDIERS?!?!? spiders are crawling everywhere. Yeah the beach was so nice and didnt feel like I was in Wisconsin but there are COUNTLESS SPIDERS crawling on the beach. Why?!?!? So no to a picnic blanket, a camp chair is a MUST.
I was only there for one night to see the meteor shower but will definitely return to enjoy the island, check out the lighthouse and come fully prepared for some anti-spiders measures. There’s also a tour led by the ranger/friends of the Rock Island org (not sure which) and SUP/kayak rental as well.