overnighting options - Mazatlan - Durango/Torreon/Saltillo

Here's a thread from a year ago . . . http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/27603439.cfm . . . there have been others that explain parking at Walmart or Sam's in Durango. Do a search using the name of the town you want to know about - at the top of each thread here - search in Mexico forum only - there have been several posts over the years.