Granada to Ronda to Sevilla

I'm trying to work out the details of the Sevilla segment of our trip. We will be sleeping in Sevilla for 4 nights and plan to do Ronda and Cordoba as day-trips. Here was the original plan... Thu, June 30: Visit Ronda as a day-time stop-over between Granada and Sevilla (train to Ronda, bus to Sevilla) Fri, July1: Sevilla
Sat, July 2: Day-trip to Cordoba Sun, July 3: Sevilla Here are my questions/concerns... First, if I leave Ronda as a stop-over on the 30th, we will have two suitcases with us. Apparently, the bus station only has 12 lockers...what would we do if these are full? Second, the bus schedule from Ronda to Sevilla says "It comes from the coast. It is not sure to get seats" for the 18:00 departure. Does anyone have experience with this Los Amarillos line and can shed any light on this? (our other option would be at 19:00 with stops that add another hour) Third, would we be better off scrapping the stop-over idea for Ronda and doing Cordoba as the stop-over on the 30th instead? Or should we do both as day-trips directly from Sevilla? Ideally, I wanted to avoid doing two day-trips in a row and/or doing a day-trip on the 3rd as the next day we'll be traveling to Toledo (too much time on the train).