If you do get a pressure tester, in addition to smelling for gasoline in the vacuum line you can check the pressure regulator by pressure. Get a steady reading, then remove the vac line ... pressure should increase around 10 psi at idle. If no increase the FPR is shot.
Yes, a failed FPR would give higher pressures, plus leak fuel into the intake manifold through the vac line. It is certainly worth checking it out.