If my running plan goes to plan for 2013 I am actually thinking of doing the White Peak Mara next year. Eek .
For 2013 my main tardgets are do better in the Exterminator (Sept) and Windgather (Oct) and go sub 50 in the Percy Pud in December.
For 2014 I want to consider (i) Grindleford Gallop and (ii) 3 Peaks or WP Mara but I think the 3 Peaks may be a bit too challenfging for me - not sure, I need to give it a bit more thought. I could possibly do both, I think there is time between them to recover.
You should post on Health & Injury - sure there are plenty of other runners with similar issues who could advise on recovery times etc (and compare failed DIY surgery attempts - LOL)