Hi acggirl, I had the op 3 years ago. Went in to hospital at 8am and was out for lunch time. Checking back on my running logs I ran 5 days later, did note that I felt a bit sluggish next few runs, but not bad enough to stop me running. I can remember doing a body pump class about 9 days later and had a weird sensation when doing core work so wouldn't recommend anything like that for a few weeks after the op.
Everyone is different and I think it depends on the individual, and as the above posts say, a few days off and an easy week won't do your training any harm.
Last year I had a marathon in Oct and dreaded the thought of 2 weeks training right in the middle of my plan in sunny Cyprus, I started my plan 2 weeks early to allow for 2 easy weeks when I was on holiday, you could maybe try that.
Lochaber is in Fort William, think itis the 10th April. Not done it before but I think it is flat. Done an easy 5 miles this morning and thought am I really up to all this marathon training again, so sooooon ????? Going to give myself 4 weeks to decide.