I can't offer much more than Pat already has. BTW, Welcome back!
Maple Creek had two active periods; 25 Oct 1886 to 18 Nov 1908, was closed for almost two years and re-opened 2 Aug 1910, closed finally 21 Dec 1923.
John H. Williams recorded three postmarks used at Maple Creek, Cal. in his massive two volume
California Town Postmarks 1849-1935, all three spell Maple Creek as two words. Yours and mine are MAPLECREEK used sometime between Feb 24 1900 and Apr 8 1911. My cover is apparently the EKU while your post card is the LKU. The Postmaster's compensation for 1907 was $94.00.

