What a beautiful herd of horses you have and I am so excited for you. I too have just joined in here after a horrible foaling mini year last year (my first with minis). You can read our story on page 2 here "New To This Forum- Expecting 5 Foals" as well as the foaling thread we began "Gracie's Mini Mommas-To-Be". I use a wireless card so my girls can not be on Marestare either
I have a fantastic foaling kit that I just bought this year after having just the basics for many, many years. You can use a Sterile Lube that comes in a small tube or you get the gallon jug of lube (I have both). Both are for OB use. I plan to check foal positions after the water breaks as I figure that will buy me time to get the vet called if I feel something not quite right. I have a great vet minutes down the road from me, but she is not always the easiest to get a hold of. I have two other vets ranging from 30-45 minutes away. We also built a hoist this year to be prepared. Luckily I can give IV shots, but only have Banamine & Ace on hand. You pose a good question though on what kind of sedative to use, and I have not talked to my vet about a sedative, but think I will call her tomorrow. I want to be prepared and even over prepared this year.
I wish you the best of luck and can not what to see your babies!