October usually is about the end of the main Laura Ingalls Wilder season for the year. If you plan a Laura trip after that, make sure you call ahead. They may or may not be able to accommodate you by opening the museum, etc. or giving lists of what there is to see. On the plus side you get autumn foliage and then snow photos. I called around to find out when the Laura museums were officially closing for the year.
Pepin, WI - Closed October 30, 2011
Independence, KS - Closed October 31, 2011 - Daily, Weekends in November, call before you go
Walnut Grove, MN - Closed October 31, 2011, Mail Order shopping still available
Burr Oak, IA - Closed October 31, 2011
De Smet, SD -
Memorial Society open all year with slightly reduced hours
Ingalls Homestead - Closed October 31, 2011, Office remains open for making reservations, etc.
Mansfield, MO - Closes November 15, 2011, Possibly will do a Christmas event, not decided yet
Malone, NY - Closed September 30, 2011, Re-opens for December 3rd for Christmas With Almanzo event (1 Day)
Spring Valley, MN - Closed October 31, 2011
Keystone, SD - Closed September 15, 2011