Help me solve a logistical conundrum with toddler

Hi, looking for some problem-solving on this one… I’m mum to a (terrible) two year old and newborn. Two year old is back at nursery next week, and I’m worried about getting him and newborn in and out safely as it’s on-street parking next to a road. Toddler is unpredictable and pretty strong, I’m worried he’d run off. Often when we leave nursery I end up having to carry him out of the door into the car because he’s being uncooperative and running away from me. Possible solutions are : 1. Newborn in baby carrier and toddler holds my hand (I’d possibly invest in reigns for extra safety) however it’d be tricky to get his shoes on and off on arrival with a baby in the carrier. Also I’d have to get her out her car seat roadside which isn’t super safe. 2. Newborn in pram, toddler holding my hand, but I’d have less control as I’d be pushing a pram. It’s also a pain getting our bulky pram in and out of the car for a sake of 30 metres. 3. I leave newborn in her car seat in the car for 5 minutes while I pop into the nursery with her brother. This would be logistically the easiest solution but I don’t think I’d feel comfortable. 4. I carry newborn in her car seat (it’s so heavy) and hold toddler’s hand. If you have any suggestions I’d be so grateful. I suppose I’m overthinking it but it’s stressing me out 😬