How do I know which one I need? I talked to another bride that wore my dress and she wore two petticoats under to make it more poofy. I don't necesarily want that but a lady at a bridal store said I should have a hoop skirt so I can walk easier. I looked online and there are so many to choose from - 6 bone, 3 bone, ruffled, etcc. How do I know what to get?