Nice looking garter. Can we get a full body pic of her? I ask because if she's wild caught there's a decent chance you could end up with some baby garters before the summer is out

88 seems a bit warm to me, but it should be fine as long as the cool side is reliably around 80.

If I could give you a quick suggestion on cage decor, you could consider getting fake plants from your local craft store (if they have that weird perfume smell to them, just wash them off) and disperse them around between the hides. The increased cover makes them feel safer and they'll spend a lot more time out in the open for you to watch them!