Thoughts on bringing my 11 month old to the anatomy ultrasound?

Keisha • 23 🌮🍷 Momma to a baby boy 💙 Girl due Nov 2019🎀Wifey to Mr. J 🥰💑👪

I’ll be by myself with him, the scan is roughly an hour so I’m nervous about bringing him. It’s at 4pm, and this is usually the time he has a cat nap in the car. If he’s not in the car he won’t have his cat nap and just go to bed half hour early or so. I just don’t want him to be fussy or anything. Anyone else bring their young one to their appointment thats this long? My boyfriend can’t get off work his day is full and I don’t know if my dad will be able to watch him at that time. 😖