I've done quite a few lanes in the peaks, the only lane that I'd stay clear of, unless you are well lifted and running 33's is the one that runs down into the top of Hollinsclough, or put another way it's the right hand fork as you look at it on the map. The left fork is OK to run either way but not the right fork, believe me you won't get up it with out a winch and ground anchor and coming down you run a big risk of ripping the arse out of you truck on the series of 2 foot steps that are close to the bottom of the fork.
I manage to rip a valve out of the NSR tyre on the rocks coming down the steps and dragged the fuel tank over the lip of each step. for those that don't know my truck it's a A series swb 2.8 with 2 in suspension lift, 2 inch body lift and 285/75/16 (33inch) tyres.
I've said my piece, you please your self.
Regards
Stuart
Remember, keep the greasy side down!