Tips/opinions strollers/wagons for 2

So I have a soon to be 4 year old and I’m currently pregnant. I’m wanting opinions and tips regarding making trips with two children. Like to the zoo, aquarium, shopping or when on vacation, etc. Did you buy a double stroller to fit both the infant car seat and toddler? Did you have the toddler walk holding on to you or your SO’s hand? I’ve seen a wagon that has the adapter for the infant car seat and read reviews that their toddler had plenty of room to ride.

We normally don’t go a whole lot of places as of now with our toddler. Just recently went to the zoo and aquarium but that does not happen often and usually when we go shopping and our toddler comes with us she usually walks holding our hands or if the store we go to has a buggy we put her in there. Please post pictures of the stroller or wagon you used with a infant and toddler please.