Thanks guys, I think Files, Tape, <folder>, right-click/restore might get me what I need. It was in a test pool, set to never change media set, so only one shows up, which may also mean all these files just fit on the one anyways? Choosing Backup Set, only one shows up so I presume that might make this easier if I only have one choice regardless.
This one tape might be 1 of 2 in a set, I see it loading one of the two tapes in this pool, and when I looked at the tape properties I did see the same stuff in this other tape. I'll let it run through its gyrations and see what it does.
All the same, a feature request of right-click a tape, "Regurgitate" or otherwise "Restore all of this tape somewhere for me, i don't care what's on it," would be awesome.