Birth kit, I wouldn't get the premade ones as they have a bunch of gloves and that sort of thing you are unlikely to need.
Food and drinks, disposable dishes
Pool and associated hose etc if you want to labor in one
Tennis ball, rolling pin, and/or massage tools, unscented lotion
Lotsa disposable underpads
Fetascope or Pinard horn would be nice to check the heartbeat
Something waterproof for the bed and/or rug (tablecloth, shower curtain, etc)
Bulb aspirator may be nice to have for IF baby need help clearing the airway or there's meconium.
Placenta bucket or bowl (we used an ice cream tub), large ziplock to put it away in
Pair of plastic cord clamps
Sharp sterile scissors for the cord (cleaned with alcohol is ok)
Arnica infusion oil (for swelling or bruising)
Shepherd's purse tincture (for PPH)
Floridix and chlorophyll (helped me stabilize after birth quite well)
Liquid bandage like newskin for minor but significant tearing
A hanging sling scale would be nice to have to weigh baby at birth and to track weight gain in the early weeks if you want. Sewing measuring tape to measure length.
Books...Emergency Childbirth, maybe Spiritual Midwifery, maybe Heart and Hands, maybe The Birth Partner. You and DH will want to have done your studying beforehand, not be looking things up in the moment. Especially if slight variations from normal come up and would make you transfer just for uncertainty. For me the hardest part of UC was to know it was ok and the birth would just happen even though labor was long and intense.
Illiana you're thinking of Laura Shanley, check her site http://www.unassistedchildbirth.com/