As far as travelling in and around that particular area of the Lanaudière region, you will find that these municipalities are all fairly close to one another, so visiting their cimeteries can easily be done in one day, two at the most if you wish to take a walk thru them.
As for finding thombstones going as far back as 1700's, that's a different story. Some graveyards along the shores of the St-Lawrence River were repeatedly flooded, and had to be moved away from the shores; such was the case of the Berthier cemetery. Others were moved to new locations to leave room for new roads (!). But some are still intact. Most are well kept and in great shape. Church records in the area are excellent, except for the parish records of St-Paul de Joliette which were lost due to not one, but two fires.
I would strongly suggest a visit to the genealogy library located in Joliette. The Lanaudiere genealogy society has published the vital records of all the catholic parishes of the Lanaudiere region; in addition to their publications, you will find there everything related to the region, including microfilms (Drouin & the Mormons)of all church records for Lanaudière, as well as microfilms of all existing census for the region.
And most of all, you will also get the help of their volunteers who are all experienced genealogists and know the region inside out, so they can be of great help before you head out to visit the parishes of your ancestors.
A note of interest: the Lanaudiere region is mostly French speaking, and not everyone is bilingual out here, so if you don't speak French, be prepared to speak "slowly" and you'll do okay !
If you wish to have the services of an English speaking volunteer at the genealogy society in Joliette, call ahead of time to let them know when you expect to visit their library, so that they can make sure to have an English speaking volunteer on the premises, on that particular day.
Rootsweb - Lanaudiere Board Admin
Coordinator of the Quebec GenWebs