You would probably have much more success with your quest if you used the accepted subject line format. One name at a time with the surname in caps, followed by the known region and any known (or approximate) dates.
for example: HUFGARD, Aschaffenburg, c1850
You might also check the Message Board and Mail List pages to see if these family names have their own message boards and/or mail lists. You can also check to see if the Kahl Valley has its own message board and/or mail list. http://boards.ancestry.com/mbexec/script/main/rwhttp://lists.rootsweb.com/
You might want to also check the RootsWeb Surname list for others researching the same families.http://rsl.rootsweb.com/