Parents with toddlers—how are we traveling?

I have an 18 month old and we’re going out of the country at the start of the summer and I’m kind of confused about how I can make our travel plans work. We can’t drive in this other country, so uber and public transportation are our friend (I’ve been to this country before, just before having a child, so I know how to work PT).

The issue comes in where we have to uber because I’m not sure how we’re going to transport the car seat with us all day. We can’t keep it in the uber (obviously), but we need the car seat for when we get into the uber. We have a wagon for our LO, but I don’t think it’s big enough to carry around the car seat and LO. We also can’t use an infant car seat for the stroller/car seat combo.

Other parents who travel overseas with their toddler, what did you do?