North of glutathione's monument and between whiterun imperial camp and swindlers den I have spawned 3 versions. 2 werewolfs hunting , farmer transforming over his dead wife yelling what have I done and hunter transforming after seeing me. All at night.
Those are hit and miss though, if you don't get an encounter you have to camp out, save and then reload. Which defeats the fun and purpose of
random encounters, you want it to be a surprise and fun, not camping out reloading until you get the encounter which isn't that fun.