I imagine the Belleville crew will move on to Brockville next. So May-June ish they'll get started.
As it stands there aren't too many trips where you're not well covered on major highways. The only trips I can think of that isn't looked after are off the beaten path, places like Haliburton and Kawarthas cottage country although Kawarthas are reasonably well serviced by port hope for Torontonians.