Had a fabulous ride with Honey on Saturday - just the two of us for about 4 hours on the trails. Not a bit of trouble getting her tacked up. She started out trying to turn around and go back to the barn, but I just kept turning her in circles whenever she did that. It didn't take long until she figured out that we would be going the direction I wanted her to go and she knocked it off. She's definitely testing things, but by going back to some basic groundwork and riding her through this, I seem to be getting my position as "lead mare" reestablished. I guess I was spoiled since she'd been so cooperative until this - I should have expected some challenges along the way. I'll keep working at being assertive with her, thanks for the tips and support.
Magic is still in a separate field

and Honey is sooo much more relaxed.
Alicia - That's a good point, but I don't think she was in heat. She hasn't behaved differently during heat before (unlike our other mare). Its really hard to even tell if she's in heat, she's just so laid back most of the time.
WSArabians - Unfortunately I can't talk too harshly to the kids that have bugged her, she's staying on their great-grandpa's land with their father's horses (for free). Father gets very defensive if you correct his kids (even though they often need it). I try to "teach" the boys gently and by example as much as possible. The good news is that they aren't around the horses too often now that its cold. We'll be getting them out of there soon.
Kevinshorses - As I said in my earlier posts, I am "correcting" these behaviors and she will be going to a trainer - thanks for letting me know that we are to "blame". I asked for help, not condescension.