As for summer training, again, you have to work within the structure of your coach's plan. You always have to keep the big picture in mind. Personally, I don't think it's any secret that I believe in a plan that puts into place a good base. If I were your coach (and I'm not so take this for what it is) I'd suggest taking as much time as you feel like you need mentally and physically to get back into the flow. Then, let your body be your guide. I've gone from 40 miles per week in recovery phase to 100+ miles per week in under a month at times. At other times, I've taken a month or more to go from 40 to 60.