Done a solo run in late May 2007. It's a great ride - even if mine was a bit of a long-distance rush (part of the fun, too): 2500 miles in 4-1/2 days.
Highly recommended, especially if you can afford a slower pace than mine.
I ran up from NJ via Maine into Campbellton, NB in an afternoon and a full day of riding. Make sure not to arrive there too late - by 8pm the town closes down and no decent food aside of fast is available. Once crossing through NB, watch out for a lot of construction zones: often plenty of soft gravel there.
From then on, a really picturesque route: I looped the whole peninsula in one day, it's much better if you do not have to. South shore is traversed on route 132, which goes through a lot of villages geared for summer visitors. May be busy in season.
Town of Gaspe is a bit anticlimatic, although there are a few restaurants and a great cafe in the shopping street above the harbor. I am a sucker for good cappucino.
From there, I've departed the shore and cut inland on route 198. For me, that was one of the highlights: beautiful rolling hills, winding road, fairly good pavement, no traffic. Pleasure!
198 reaches the St. Lawrence River near Cap Chat. The river is imposing, difficult to write about - one has to experience it. Check out the wind farm in Cap Chat, especially the vertical turbine, called the Eole. Intriguing.
I overnighted in Matane, getting ready to take the ferry. I stayed in the Comfort Inn, but now would recommend the Riotel there instead - much nicer and has a restaurant on site.
Next morning, I crossed on the ferry to Baie-Comeau. Drove some 20 miles north up to Manic 2, the first of the big powerplants on Quebec section of the Trans-Labrador Highway. (Got me hooked, by the way & I rode the whole Trans-Lab this past June).
On the '07 Gaspe trip, however, I backtracked out of the Trans-lab and continued to Quebec City to spend the night there. I love that place and always try to stay there if I am in the area.
Last day was a 9-hr haul back home on the Interstate.
Regarding places to stay: I usually go for hotels. Prefer the Choice Hotels chain in this area (Comfort Inns, etc) because their on-line reservation system is very efficient. Plus, they accept cancellations until 4pm; I can reserve in a few locales and then cancel as the day progresses and I see how my schedule develops.
Have fun on the trip!