The following link seems to list some of your relatives:
http://omahaobits.wordpress.com/ga-gn/. I'll go to the library sometime this week to get the obits for Myrtle and Samuel. There are quite a few that could be Wilson or William. Can you rule any of these out, or should I look for them all?
GARDNER, W. A.; 50; 14 Feb 1906 WH eve p 10/DC @
GARDNER, Will; 4 Feb 1904 WH eve p 3 @ (Tacoma, WA)*
GARDNER, William A.; 73; 24 Mar 1944 OWH morn p 28 @ Hillcrest*
GARDNER, William H.; 12 Feb 1904 Omaha Bee morn p 8 @ Walnut Hill, Council Bluffs, IA
GARDNER, William; 12 Feb 1906 WH eve p 8 @ (lodge notice)