Folks, so here are the rough mileages we are undertaking each day:
Day 1 to Meridian - 81 mi
Day 2 to Copperas Cove - 74 mi
Day 3 to Marble Falls - 55 mi
Day 4 to Blanco - 44 mi
Day 5 to San Antonio - 48 mi
Days 1, 2 and 5 I'd almost swear to the miles, but days 3 and 4 could be 2 or 3 more as I didn't go over them as closely.
I've made campsite reservations for Meridian and Blanco (8th and 11th respectively). I reserved one site for each of those days. We will likely need a 2nd spot at each of these places, depending on our final count.
I haven't made any hotel reservations as of this point, but we should be thinking about that as well.