In 2012 we stopped at the George Starkey Mountain Hut (we run past it on the event) and this was booked thru the race org but this wasn't avail this year for this year......which was a shame as it did indeed have a roaring log fire (i know as it was me chucking the logs on the fire ;-)) It's self catering too.
I did this years event too - memorable in all sorts of ways....I'm rembering the driving rain / wind across Askham Common at 5:30pm ish with a lot more fondness sat here at home nursing a malt whiskey that's for sure....GREAT day out though.
I'd stop at the George Starkey hut again next yr if avail........it looked empty when we ran past at the weekend. Not sure what the sketch is re: booking it privately - but here's a link if that's any help to anyone.
http://www.abmsac.org.uk/huts.html
Maybe the upside down caravan in the field at Patterdale will have righted itself and will be taking bookings for next year!