There's been a few interesting trips over the years. John Pearson can tell you better but we did a trip to Wales and John used his RL recovery to remove a Valentine turret for his project. We had to leave the truck overnight in the boonies as it got a bit stuck..... Managed to recover it the next day though!
On one Plain trip, I borrowed a Militant Mk1 to recover a Sherman engine. Unfortunately its fuel system and one of its batteries was a bit crook and when it stopped in the middle of nowhere, we had to walk two miles through the moonscape in pouring rain to get the battery off my truck, then carry it two miles back again to jump start the Militant. We even had to use some fuel fittings from a Ferret target to repair the truck.
I never used a borrowed truck again!
Lastly, for now, I did a trip to Fingringhoe to recover Cromwell parts and mid lift of a turret, the pressure pipe fitting on the HIAB pump failed. It's amazing how far the jet of oil went! Fortunately, Tony had a friend reasonably locally so we took the fitting off and drove in my unit down to his farm and welded the fitting back together. It held ok though I replaced when I got home.
Such are the joys of range work! You really are often miles from anywhere so you have to be very self sufficient and aware of the risks. All a bit academic now though as access is more or less impossible.