They are only wary of stuff the see as out of the ordinary, if they get used to people they don't spook, see it on a few places I go working can walk right past rabbits crows etc in hi viz gear as they know there's no threat. I remember watching a passion for angling as a kid Chris Yates put a deck chair with a dummy sat in it in the water for a few week and baited the front of it, then when he went fishing he was sat in the chair and the fish swam right up to him