Replying to Car Camping in Summit County

So last night I camped out in my car in the walmart parking lot in frisco...when i got up in the morning i noticed "no parking overnight" signs all over the parking lot (how i didnt see them when i was pulling in i dont know) so in order to avoid being messed with in the middle of the night im in need of a new location...so does anyone have any good places to park?  should i just find a nice quiet neighborhood or will that look to  sketch? or should i just keep using walmarts lot until i get told to leave?  any advice would be muchly appreciated +k