Yeah, I take them out in my backyard. I have a 6ft. privacy fence all the way around so I don't have to worry about "other" animals sneaking up on us.
And I wouldn't dream of doing it if I wasn't confident in the bond. Notice I only have 4 of them....Kodah stayed safely inside in his pouch, I don't trust him. I think he'd make a run for it the first chance he got.
They enjoy the fresh air and open space every once in awhile.