Whitetail Deer behavior question

I've been seeing what seems to me to be unusual behavior by some whitetails that like to eat my flowers. For about a year and a half, I've routinely seen a buck and a doe come through together. This summer they're visiting with two fawns. Last year he was a spike buck so I guessed that he was young of the year, but he's still hanging out with this doe. It really seems like a family, which strikes me as not normal behavior. Have others seen this sort of behavior?

I see it a lot in other species, if what you're describing fits. Winter, spring and summer there's not a whole lot of gender segregation, except perhaps with the oldest, largest bucks. And I'm not sure that's "gender segregation" so much as less willingness to accept people. Younger bucks seem perfectly content to stay with the does, at least till they clean the velvet from their antlers. Right now we have a Sitka blacktail doe with a couple of fawns hanging around the house, much to my wife's displeasure (plantings). Some days they're unattended, some with a spike buck and some with a forked horn. Once with both, as a matter of fact. On rare occasions she's appeared with another doe and a single fawn. Come fall I expect the bucks to mostly disappear and the does and fawns to congregate more.

That's Sitka blacktail, but I've seen the same with mule deer on our place in the Southwest, Columbia blacktail in the northwest, and Coues whitetails in the far Southwest where I grew up.

Not at all abnormal. Young Whitetail bucks will hang with the doe's for a couple of summers.