I am curious - what is the rush to get through the meseta? Perhaps another way to approach it is to choose some of the 'recommended' albergues on the meseta and plan your walk to reach those each day. For example...
I prefer Hontanas over Hornillos, and Hospital San Nicholas over Castrojeriz. Albergue En el Camino in Boadilla is a great stop, for the garden and the warm hospitality, and Albergue Espiritu Santo in Carrion de los Condes offers a break from the overcrowded, bunkbed-filled dormitories. Stop in Moratinos and you will meet Rebekkah from this forum.
Bercianos has one of the best shared dinners on the Way. If you go the other route after Sahagun, you will find fantastic hospitality in Calzadilla de los Hermanillos.
There are great pastries in Sahagun and Villarente del Puente, so at least slow down there!
And then of course: listen to your body, rest as you go, and enjoy it all...