Ever try a jelly bean hunt? Our rule: they have to be in plain sight, i.e. you don't have to move anything to see them. For example, a yellow jelly bean in a yellow daffodil. Pop did this for me as a kid the year it poured rain and the yard was a mud hole. It was a BIG hit and he continued hiding jelly beans till I was married and on my own. Even then, I wanted a jelly bean hunt. My kids are old enough now that they get jelly beans inside and plastic eggs outside.
BTW, I would absolutely do white eggs in the snow, as long as they're in plain sight!!!