I've stayed at the Double Tree a couple of times over the years. It's nice. When I moved back to Dallas 18 years ago, our house was in limbo, so we got a room there. I didn't trust the movers with my guns and they weren't staying in the car, so I loaded up what I had in a hanging garment bag and hung it on the luggage cart. Put my hard cases on the bottom on the cart and wheeled it right through the lobby to my room. No questions asked.
I'm not sure you could do that now.
Are you sure it's Addison? Medical City is in North Dallas at 75 and Forest Ave. I saw the new section of the hospital last week, I'm assuming you're going to be at the building on the east side of Hwy75. DO NOT STAY anywhere in that neighborhood east of 75. That area on Forest around Greenville and Abrams isn't as nice as it used to be. I know there are some motels there, usually a few murders every year, don't stay there.
That intersection of 75 and Forest is covered up in homeless panhandlers.
I think you'd be ok grabbing breakfast at the Whataburger where you can watch your car there, but it's not that nice anymore. On the west side of 75, it's better. Just down from the hospital is Cyndi's Deli. You won't have issues there. Breakfast, lunch and light dinner. Not too expensive. 11111 North Central Expressway, Ste G, Dallas, TX 75243 - be sure to get your daughter a cherry or cheese danish or strudel.
Further down is Norma's Diner. 9100 N Central Expy, Caruth Plaza east of 75 at Park lane, Dallas, TX 75231-5922 Safe but pay attnetion anywhere you go. Even Northpark Mall has gotten more sketch over the years. Across from NorthPark is a nice grocery store, bookstore and a couple of more expensive restaurants. Trader Joe's at Meadow and 75 = Cheap cut flowers.