we have 2 children under 3 & are debating on which strollers to bring. i'm just wondering if you can bring the stroller on the water taxi open w/ child in it or if (like taking a bus), you have to fold it up & carry it on. if we have to fold them up, we'll take our lighter-weight ones. also, is it quicker to walk in the a.m. to the parks? are there long lines for the water taxi? (we're looking at RP in may) thanks.