How are they protected now? Did you get a chicken sitter to close the coop at night and open in morning, feed and give fresh water daily? If so then it seems that's the same protection as your currently doing so wont matter if your gone for a week.
Build a simple run with a door. Use 14 ga welded wire. Comes in 4ft X 50ft rolls at lowe's or home depot for $38. Attach to your run frame with 3/4 inch washers and 1-1 1/4 inch exterior screws. You can cut in half to bury under sod running out 2 ft from run wall to stop predators too. With help from a friend you should be able to build one in two short days or one long day.