I'm a little surprised at the horror stories about open relationships, I must say. My own observation is that if it sends a relationship to its destruction it's usually more that it opened pre-existing fault lines. My wife and I didn't have an open relationship, nor were we polyamorous, but we certainly invited a number of others to our bed.
We started with couples but found that typically it appeared that the woman had agreed so that she would get a night off from her husband. We never did find a couple who were as equally engaged in the enjoyment of sex as my wife and I. So we switched to single men. And that worked pretty well. We don't indulge any longer for a number of reasons but it never affected our marriage adversely. Indeed our relationship is arguably deeper because of the trust required.
A couple of those men were bi and I tried sex with them but it's not for me. I was curious, but mainly about how the acts themselves felt. I've never met a man I've been attracted to, so yeah I'm straight, I guess. And that's fine. I'd wondered about it, even fantasised about it, tried it, ruled it out.
I should point out that all this was a long time before I started dressing fully. I did underdress at the time, though never in sexual situations.
Would I do it now, given that I dress? Maybe with another CD? No. It was a chapter in my life that's now passed and that's OK. I don't regret any of it but I've no need to return. And since I don't consider my dressing sexual in and of itself it would be a little odd if I tailored part of my sex life around it.
OP, if your wife is supportive, if the trust is there, there needn't be any harm, even with a family. Trust me, there are plenty of ways and means of meeting people and enjoying sexual company that don't involve hysterical stereotypes of Craigslist etc. But it should definitely be a case of 'measure twice, cut once' with your wife. It is possible to talk a good game but to regret the reality with hindsight. Proceed with caution and fully open communication though and you may open up a fulfilling new aspect to life.