Hiya Theresa,
Welcome back! I didn't mention it last time, but I appreciate that you're considering your transportation options in advance. This part of a vacation often gets overlooked in favor of all the other magical details, but in my experience, it can make or break a day if you don't know what to expect.
Depending on the size of your stroller, yes, you can fit your entire party, plus a stroller, in your
Minnie Van. I have a Mockingbird double stroller, which, although it fits within the
Walt Disney World Resort property sizing rules, is a larger stroller. We were able to fit that in the trunk without any problem at all (we did take the seats off just because the stroller is an awkward shape, but it would've fit if we hadn't). In my experience, Minnie Vans are larger SUVs, and their trunk space is generous. Since you are only using one car seat, the other car seat will occupy some trunk space. Consider this when selecting your stroller rental. A fellow panelist mentioned that their City Mini Double stroller fit well in the trunk, even with the extra car seat, for example. If your stroller isn't fitting, a Cast Member will help you figure out a plan B, which may include folding down part of the back seat or requesting an additional Minnie Van for your group (in rare circumstances). We typically ask the Cast Member driving if it is possible to have one of our group sit in the front passenger seat, so that one person can have additional leg room, and it would enable us to put part of the back seat down if needed.
I hope this was helpful, Theresa! Please come back and see us if you need anything else.
Happy Planning,
Ashley F.