We have been there in March for 2 weeks, and really enjoy it. For us from Canada it was like an oasis in the middle of the winter;) We had our kayaks and paddle on the river and intercostal water, we had also the bikes, we visited everything around in Miami, had a trip to Keys and travel few times to Everglades.
The cabins are comfortable if you bring some additional mattress, the only thing I can complain about was the restrooms/shower building which need a renovation…
We had our camping gazebo and propane stove to cook and we enjoyed every night a nice fire wood.
If you are allergic to mosquitos and no-see-ums, bring a high DEET insect repellent and some Benadryl spray

This place is so convenient however whenever I have gone I've felt like the water was dirty. I know that it is a river so it cannot be as clear as the ocean but why would I want to go there with the ocean right down the street? I guess for the picnic grounds which is why we tend to have events there.

rent or bring your own...we've used it for some nice kayaking with adults and kids...we live in just south of there and it's very convenient and 'user friendly'...

Several friends and I stayed in the cabins (A/C!) with our kids aged 2 to 10 years for one night. It is right in the middle of summer and we underestimated the capabilities of the bugs....made it past multiple layerings of DEET! So don't stay in the summer. The cabins are fine. My cabin was missing part of a floorboard on the porch - unsafe in the extreme for the little ones. The shower was incredibly hot. Too hot for the kids, they had to shower at the bike wash back near the beach. Added to that the 3 people pounding on several cabin doors at 1 a.m. asking for jumper cables (um, no thank you potential criminals) and then later seen in the bathroom shooting up and our experience can definitely be called terrible. It was interesting to be smack in the middle of a large city and surrounded by quiet woods. The campground was as clean as possible, the beach seemed pretty grubby but its obvious both get a lot of wear. A poor showing for a state park - but maybe the caveat is 'urban' state park.