Did you have any particular theme in mind or are you just looking for a list of items for the teams to find by going door-to-door?
There is the option of doing a food drive hunt where the teams have a list of the most needed items at a local food bank. (one of each item)
Or you could do a Good Samaritan Hunt where the teams have to perform certain acts of service throughout the neighborhood and get signatures.
Or you could have a list of everyday items the teams have to find by going door to door.
Finally, if you could get the teams to use some of the skills they're developing by pre-picking certain homes or businesses to leave clues at that they have to follow using compass positions and other clues.