Do any of you have experience with the petite sizing on Gap bottoms? I typically buy regular lengths in BF's but would like to have a shorter pair for spring for a less bulky roll on the bottom (I don't want to hem my current pair because I like them full length for fall/winter.) I'm also thinking about trying the Skinny Mini in petite. (The regulars made for a lot of extra fabric when scrunched.) My question is whether it is necessary to size up in petites or go with the normal regular size. TIA.