Bridesmaids procrastinating

So my maid of honor is on top of it. Keeping things on schedule, remembering dates and prices and deadlines.

But the rest of them? Due to the area I'm in my wedding is either going to be like 80 degrees or 46 degrees and no inbetween of course. And two of my bridesmaids are disabled and pants are easier (she doesn't like people seeing her surgical scars, she hasn't worn shorts since we were freshman in highschool) so I gave them the go ahead on pants. I have 5 in total and 2 of them were deadset on wearing skirts instead and I said okay it balances out as every other person would be wearing pants. My two bridesmaids wearing skirts haven't found skirts that they want to spend money on yet and it's frustrating because on one hand not a big deal on the other hand it's not like I'm asking designer brand my moh (the most disabled) got her slacks at Walmart and hemmed hers to suit her and offered to help everyone else as well.
A different bridesmaid went about 8 hours away for family and a different one went across the country and they promised they would still be here for the wedding and the rehearsal. The one 8 hours away is now saying that they'll make it down here maybe halfway during the rehearsal and normally I'd be understanding but I should preface that this particular bridesmaid is My Sibling and the rest of my family is coming down the week before so. The one coming across the country has already requested time off and bought her plane ticket and made accommodations to stay (despite me saying I'd do it for her). I showed that I was getting frustrated with my sibling and now they're giving me a huge attitude about it. Idk maybe it really is nothing but