Foster's first day tips???

[Sudilar]

Ok, I have the 8.5 yr. old male GSD, Killian and the @5 yr. old female, Shiloh. Tomorrow a 7 yr. old male owner surrender, Gaylord, will be added for fostering. They have all met at the vets and everything went well. Now my question is: how do I get the foster into the house with the least amount of trouble? Do I bring them all outside to meet again? in front of the house or down the block? Bring the foster to the yard and then bring my two out (with help and on leads)? I have a fenced yard and also a fenced in area in case I want to block the dogs from the main yard. Do I intoduce them in separate sections? Do I bring him in the front door??? This is my first foster and I want to get it right with no fights. Thanks for all hints and tips!
http://www.gsdrescue1.org/frames/gaylord.htm
He is a red and black, it doesn't show up in his pic.