The tent sites are grassy, which was very nice and the bathrooms were nice compared to what you'd find at a typical beach side facility that is also open to the public paying for its use. Note on the weekends, the bathrooms can get messy due to all the extra traffic. The rest of the time the bathrooms were clean. We paid for a $10 seven day pass into Padre National Seashore and went to that beach most of the time. It was much cleaner than IB Magee Beach.
A couple suggestions for tent camping: 1) Pack light to stay cool. It is fairly warm throughout the summer. 2) Keep the rain flap on tent. It was pretty windy the first couple nights. 3) Bring earplugs to sleep in case it is windy.
Nearby attractions include Port Aransas Beach (1.2 miles), Leonabelle Turnbull Birding Center (1.3 miles), and Mustang Island State Park (1.6 miles).