We do a tour of the maritimes (minus nufie) nearly every summer. And HELL YES it's worth it. I've even seen a bald eagle out there. I dunno about going west, tho. There's not much to see until you hit the rockies. But the costal tour from Quebec city, over Gaspe, round NB, over the Confederation bridge (worth the gas all on it's own) round PEI (stop over at Avonlea and Green Gables) ferry to NS, round Cape Breton, back through NB, pop over the border nip through Maine, New Hampshire, Vermont, NY, over to Niagra, back over the border into ontario, stop in TO to hit the scottish butcher's and a quick end run home.
It's worth it.