This thread was originally started by me. To answer a couple of questions. Yes I did eventually get rid of the red mite on me. Once I used the sulphur bomb on the hen house I think I managed to kill all the red mite there so I stopped reinfecting myself. I kept treating myself using tea tree soap in the shower, and something called "Vosene for kids" shampoo. It's a head lice repellent for daily use which also has tea tree and eucalyptus oils in it. I continued to use bite cream until all the bites healed up and stopped being itchy. To this day I keep a few disposable plastic shower caps near the back door and I always wear one when going into the coop. I spray myself with nit repellent (which is actually for hair) but I use it on my hands and clothes before cleaning out the hen house. I haven't seen any more red mite in the hen house but you can never be too sure!
For Susan Adams: Here's how I finally got rid of the red mite in the hen house. I bought something called a sulphur candle. It comes in a tin with a wick. Wait until a dry day and the warmer the better. Place the tin in the hen house, light the wick and close the hen house up completely. (Obviously the hens need to be out of the house

) Wait until the candle has completely burned out (it tells you on the tin how long this takes) then open the house up as fully as possible. Remove any bedding and dispose of it. (Burning is best). Use a scrubbing brush or similar to remove any droppings and dirt. Then use a power washer to completely wash the house inside and out. (A power washer is one of those electric things you attach that spays water under pressure) Pay particular attention to the joins, cracks and around doors, windows etc.and remove perches ladders etc and spray them all over too. When I did it thousands of dead mites washed out of the house. The outflow was grey with them!! Once the water is running clear leave the house to dry. Once dry use new bedding in the house and sprinkle DE into cracks and crevices and under the bedding. Finally use some sort of barrier on the birds (I use pyrethrin liquid as a drop at the back of their necks - it's actually for dogs and cats but works well for red mite on chickens and comes in a little tube). Once you've done this you should be red mite clear. From what you say it might be a good idea to try to move you chicken house away from overhanging trees and also wooden fences. (Red mites could still be in those places).
Check regularly for red mite by waiting until it's dark and then using a white tissue wipe along under the hens perches. Use a firm swipe. If any red is on the tissue it means you have mites.
As for bites on you well you have my fullest and heartfelt sympathies. It took me ages to get rid of them on me. Try the things I did above. Replace your normal shampoo and the kids shampoo with a head lice repellent everyday shampoo like the Vosene mentioned above. If you can't get one, look for a shampoo that contains tea tree oil - your pharmacist may be able to help you. (By that I mean one that says it is to repel head lice and not TREAT head lice. The treatment ones are too strong to use regularly but if you still have mites on you or the kids you should start by using a head lice treatment lotion. I am in the UK and I used Hedrin but if you are in another country I am sure they will have an equivalent.) Get some bite and sting cream and apply to the bites. My bites were the itchiest bites I've ever had from anything! Also buy a bottle of tea tree oil (it's expensive but worth it) and add about a dessertspoonful to your detergent every time you wash bedding for the next couple of weeks.
Once you get your red mite under control you can start enjoying your hens again. It would be a shame to forgo the pleasure of them and the eggs.