Unless you open the blisters there will be almost no drying of the laminate in that three month period. A partial cause of the blistering is that the outer raised surface of the blister isn't pourous enough to relieve the pressure building up, and so the pressure pushes the membrane away from the hull. With the membrane that forms the outside of the blister in place, very little water can pass through compared to with the membrane removed.
One minor suggestion, having seen the photos it would probably make sense to have a shallow peel and then grind out the deeper delaminated resin. On a boat like the Catalina 22, another suggestion, for what it is worth, it would sure be a lot easier to do the layup and grinding with the boat turned upside down.