Two outings, with time left together
Start with a beach visit at Andy Bowie and a separate walk at the Laguna Madre Nature Trail. This is a starting point for two days, not an instruction to fill every hour. Keep the rest for the meal, music, boat outing or time at your accommodation that you both want.
A Gulf beach day
Choose how much time you actually want on the sand, then plan food and the journey back around it. If another entrance is closer to where you're staying, replace Andy Bowie with that place in My Trip. Read beach conditions before setting out; a walk and a swim are different choices.
A slower bayside outing
Visit the Nature Trail during permitted access hours for a look at lagoon habitat. Bring binoculars if watching birds interests you, but don't make a particular sighting the test of a good walk. For a more focused wildlife visit, consider swapping it for the Birding Center and check its separate admission arrangements.
Choose your evening rather than accepting a fixed package
For a dinner with water views, compare waterfront restaurants. For music, browse venues and confirm the actual date and performer. A bayside table, a beach bar and an indoor meal are different settings; agree which one sounds good before making a reservation.
If you book a cruise, dinner or another experience on a different website, add its provider, time and confirmation to your private plan. Saving these two suggestions neither books an experience nor publishes your trip. You can remove a stop or move it to a different day without losing the outside reservation.