When and where were Boyd and Margaret born?
The most recent Census that is viewable by the public was the 1930 Census. Finding family members after 1930 is more difficult. An obituary is usually a good source of information. To find their obituaries, you must know when they died.
You can search the the Idaho Death Index but you have to search through each county. Go to www.rootsweb.ancestry.com/~idgenweb/deaths/search.htm
You can search through the Social Security Death Index, http://ssdi.rootsweb.ancestry.com/cgi-bin/ssdi.cgi
,however, Reynolds is a common surname. This is where knowing the birth date helps. Successful Searching!