Two days without racing around the island
This weekend keeps the south end together on one day and the north-end wildlife stops together on the other. It starts with Isla Blanca Park, then pairs the Birding & Nature Center with Sea Turtle, Inc.. Swap the two days if opening hours or weather make the reverse order easier.
Day one: settle in and see the Gulf
Add your hotel or condo check-in before choosing how long to spend at Isla Blanca. If you arrive late, make the beach visit shorter or move it to the next day. You don't have to add the jetty to enjoy the park; a beach outing and walking on exposed rocks are different decisions. The county park page is a starting point for current park contact details.
Keep dinner flexible. Browse waterfront restaurants or bars and live music for an evening you actually want, then check that venue's schedule rather than assuming a weekend means live music everywhere.
Day two: choose one or two wildlife visits
Start with the Birding Center if a boardwalk and watching birds sound good. Add Sea Turtle, Inc. after a break only if the group wants another visit. They are separate attractions, with separate admission and opening arrangements. Check the Birding Center's visitor details and the turtle center before leaving.
If your return drive is early, choose just one. My Trip lets you remove a stop, keep a note about a booking made elsewhere, or move the whole day when your plans change. A weekend doesn't need a final attraction squeezed in before checkout.