Thanks for all your replies, gave me things to think about!!

I would really love to have her out as much as possible. I think a more permanent gate with open/close for DS's room would be a better idea. I think she will be okay, it will just take some getting used to. Hope I don't trip over her
I will need to make myself more productive at night when Sienna will wind down (maybe

LOL). I was trying to carve out some time for myself because I am more productive in the mornings.
Olik you gave me some ideas... I wish DS's school started earlier. As it is I only take a 1/2 lunch at work so I can get DS to school and pick him up. (I am hourly) Because of DH's hours I do the run around. Now that the weather is improving, I might trying to run Sienna while on a bike in the mornings before DS is up, I would just do it up and down the street... I don't think she gets enough exercise in the yard, especially since we have to retrain her to drop the ball- mostly she tries to play keep away. If I just leave her out there to explore etc, she digs and eats muddy dirt clods
Winter is hard. I am looking forward to being outside as much as possible. More exercise will be good for Sienna and a good release for me.