As someone who has twins, I will tell you that you will regret it if you do two singles. I understand the point people make that they are less maneuverable, but I don't think it's that big of a deal. We did it for years and didn't find it all that hard. If it annoys someone that we have a double, sorry, but oh well. We tried two singles and just hated it. No good reason that two people have to push, two people have to carry strollers into the tram, two strollers to park in stroller parking, etc... Just so much better with one. Plus, when exiting the park after night shows, just easier to have both of them right in front of you.