We've been in Las Vegas for a few months and often drive by the Cannery (although we haven't played there this year -- love Waverly's steakhouse, have a coupon for 1/2 off... but I digress). Every time I've driven by I've seen several 18 wheelers and at least one or more RVs in the parking lot. I recall last year asking about overnight RV parking and was told by security that you can only park there if you have a room in the hotel (this was in 2008).
See other reports below. It seems that Cannery has no consistent policy. For that reason, and because there are other places to park, I would avoid the Cannery. However, if for some reason you want to stay here you should call ahead and ask Security if it's OK. Write down the name of the person that says "yes". Good luck.
You can change your listing on this one, on 4/8/09 we were informed the Cannery North would no longer allow overnight RV stays in the West parking lot due to some recent bad experiences during a NASCAR race event. Chalk another one off due to a few bad apples!
RV parking is in the lot behind the casino and hotel rooms. There aren't any signs but this lot doesn't appear to get much use. We stayed two separate times, three nights in all. Security made regular patrols but they never stopped to asked us to check in so it doesn't seem to be required.
