I have camped many times on Boca Chita and have always had a great time. The channel into the harbor is well marked and the harbor itself is excellent and well sheltered. On the weekends try to arrive early as the harbor fills up quickly. Another option is to arrive at dusk, when the many day boaters have departed. The island is relatively small (one can walk around the entire key in about 15 minutes). If you have kids, this is great because you can let them run loose without having to worry. Typically there are also plenty of other kids on the island, as well as many exploring opportunities, so the kids will always have a great time on their own. One can relax and enjoy the beautiful view of Biscayne Bay and the Atlantic Ocean. The campsites are good and I have never seen more than 10 other tents at a time at the campsites. The harbor is typically lively at night (i.e. noisy), but in general the 10pm limit for playing music is respected. The one time I was there when a boat didn't heed this rule, a Miami Dade Police boat showed up relatively quickly and silenced the offender. I have also noticed that many of the same boats are there every weekend which adds a nice neighborly feel to the harbor. The bathroom facilities are relatively well maintained and a cleaning crew shows up every Sunday morning to clean them. If you are looking for a quiet relaxing place to camp, Boca Chita is great. Where else in South Florida can you have an ocean view a few yards from the water for $15 a night? My only warning would be to make sure to clear out before noon on Sundays. After that, a hoard of Sunday boaters descends upon the island with plenty of loud music, shouting and beer guzzling.... The transformation is rather shocking. While the times I have stayed on Boca Chita the bugs have been at a minimum (Jan - Mar), I would highly recommend bringing some bug spray with you as they do come out in the evening.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.