Now I do have the wrong hoop skirt underneath it (Elizabethan) but the general shape is there and I made the dimensions for a proper era crinoline. I can also see what they might mean about needing more than one petticoat to hide the hoops! I didn't really change much to the pattern (nothing at all actually).
These are the ruffles/pleats on the waistband. I wasn't too concerned about getting them perfectly even because I did a drawstring waistband. Although I did have to repin a couple of times!