The Javascript code in the previous newsletter had a problem with the date format -- it assumed the date in the parameter could be parsed directly by Campground Master, but the date format used in the links from the vacancy grid (e.g. May 23, 2005) could not be understood in the last beta version.
This has now bee fixed on both ends -- The new beta v3.1.11 can interpret that date format directly, and also the Javascript has been updated to convert the date into the mm/dd/yy format that Campground Master can deal with more easily (and this might look better on your web form anyway).
The corrected Javascript code using a single entry field for the arrival date can be found on the web site (the code in the previous newsletter has been updated). Or if you use the Javascript in the new web form example just mentioned in this newsletter then that's already been taken care of.