It can't hurt! There are plenty of derelict and 'awaiting restoration' trucks out there getting older and older. If your group can get a few more of them rolling, albeit in sheep's clothing, all the better.
I would suggest the Armoured Personnel Carrier would be a better crowd pleaser. The Otter is a cute shape, but how many member of your group or other reenacters will be able to enjoy the ride compared to clambering into the boxy back end of an Armoured Personnel Carrier?
Although purists mourn about cutting up FV432 APCs to make Panzers and Stugs, the presence of these otherwise unobtainable vehicle likenesses has brought a new life to many reenacting groups. I vote yes.