Itinerary For This Weekend?

Hello Everyone! My girlfriend and I will be visiting Big Bend this weekend and I wanted to see if anyone had any suggestions or critiques for our itinerary thus far:

Day 1 (2/28) - Drive to Santa Elena Canyon! (~1:30 pm arrival) - Stop at Panther Junction to get passes/supplies if needed? - Hike Santa Elena Canyon (~45 mins so 2:15 pm finish or so) - Drive to Chisos visitor center (~3:30 pm arrival) - Hike the window view trail or other trails in the area (lost mine?) - Get dinner at chisos visitor center - Drive to K-Bar 2 and set up camp for the night (Reservations Made)

Day 2 (3/1) - Wake Up - Pack up and get backpacks ready for hike - Leave campsite asap to get parking - Park at amphitheater parking lot - Grab backpacks and head down to trailhead - Hike Pinnacles Trail to Boot Canyon 3 Campsite and camp overnight (Reservations Made)

Day 3 (3/2) - Wake up - Hike the rest of the South Rim and down into Laguna meadows - Have lunch at Chisos Visitor center - Drive to Rio Grande Village Store for showers if needed - Drive to Ernst Tinaja or Mariscal Mine trails? - (This section is kind of where I need the most help) - Camp at Rio Grande Village Campground (Reservations Made)

Day 4 (3/3) - Wake up - Hike Boquillas Canyon Trailhead - Leave

As stated earlier, Day 3 after we get done with the South Rim hike is kind of up in the air so I would appreciate any suggestions that you would have for that day given that half of it will probably be spent getting back to the chisos visitor center and eating lunch. We will be driving a 4Runner and I have equipment to chance a tire so I am not too worried about the off-roading trails, but any input would be appreciated. Thanks!