One bright spot: in the early to mid adulthood of boomers, CD's were sick and perverted members of society. Now, although they may not be embraced as good-ol-boys, I think there is at least a bit more tolerance than that. Progress has been made - albeit slow, it's still progress.
As far as honesty goes, absolutely the trust and what else are you hiding is a factor with a wife. How's about kids, siblings and in-laws? When is coming out selfishly inflicting an emotional burden on a loved one vs. sharing who you are? When does seeking acceptance of a part of you warrant the cost? Case in point, my mother lost a son and husband within 12 mos and 12 days of each other. A heavy loss - would coming out to her now be liberating, adding additional loss, allowing her to experience new lifestyles, beneficial to him or her in any way? Now I lost the same brother and father AND found out my husband is TG in that same time frame - I can't answer those questions with any certainty.
Not saying hiding is the best policy, but I think the CD has a huge responsibility to know how big a piece CDing is to his life and needs to share that intimate detail with compassion and respect for his position in others' lives.