Pac-/Man-
I don’t have firsthand experience or knowledge about this, but a quick Google search for “mobile broadband no contract” brought up several matches, including a Verizon offer.
My experience with Verizon’s coverage (cell phone, not broadband) in the Catskills has been very good.
The downside is you may need to purchase a $129 hardware device from Verizon before you can even start purchasing minutes.