Ever seen "Amazing Race"?
Pair up YM/YW. Have them travel, by various methods, to other members' houses. (this requires prior coordination and enlistment of those members).
Use the same themes, such as road blocks and detours (a road-block is something only one team member can complete, a detour provides a choice of two tasks that the team may choose to complete.)
An example road-block could be have the YW demonstrate how to tie a Neck-Tie. Have the YM prepare and bake a pan of brownies or cookies. (Ok, in the race, the team chooses who completes the task. In this case, you could specify who had to complete them.)
An example detour may be to watch or collect. Spend time watching a designated Fireside talk or some other useful video that takes a while....or......collect a pre-determined amount of canned food donations from neighbors in the area (scavenger hunt style). The team chooses which task to complete.
End at a predetermined location. Enjoy any goodies you created along the way. Collect canned goods for donation to food stores/church welfare.
Use your imagination for any deviations. Possibilities are endless. It could also be a continuing competition. Teams finishing first get a slight head-start next time.
It could be time-consuming. Plan carefully.