Even if they don't do anything big (which they likely wouldn't), they could potential squeeze in a dozen or so dates over 3 weeks by just hitting a few major markets like: If they hit 10-15 of the top 25 metro areas, that would be a decent tour:
https://en.wikipedia.org/wiki/List_of_Metropolitan_Statistical_AreasI could see them picking some shows in just the following areas:
East: NYC, Philly, Boston, D.C./Baltimore
West: L.A., San Francisco, Vegas, Denver
Midwest: Detroit, Chicago, Cleveland, Minneapolis
That's 12 right there. And there are good-sized markets in Phoenix, Dallas, Houston, Atlanta, and Miami they could hit as well (not to mention a couple of Canadian dates).