Other than avoiding Hurricanes and drunk college students, here are some fun things to do on Bolivar or on Galveston Island.
I have some restaurant recommendations from locals listed, as well.
McFaddin National Wildlife Refuge
7950 South gulfway Drive, Sabine Pass, TX 77655, (409) 971-2909
Bolivar Point Lighthouse
Everett, Bolivar Peninsula, TX 77650
Gregory Park
2290 State Highway 87, Bolivar Peninsula, TX 77650