I have been considering something along these lines myself although I haven't got very far with anything as yet. Wasn't sure whether to go for SAS Jeep raids on airfields or the more undercover LRDG type of raid, sneaking up and planting charges on aircraft and fuel depots.
Have gathered a few of the Revell/Matchbox LRDG sets and searching around for suitable 20mm figures, was also intested in the new SHQ vehicles, perhaps they will release a range of suitable figures.
Did make a start on a few target markers though, converted some Airfix Me109Gs into G2trop fighters. Will post some pictures when I have doctored them a little as they each have the dreaded wonky cross on the tail.
Here they are suitably edited
Cheers
Stu