I am considering taking my 5 yr old and 6 yr old in June. It will just be the 3 of us. For which rides might this be a problem? I would prefer to put them together and ride in car behind them over putting one with a stranger, but I read somewhere kids younger than 7 ride with an adult. So do they just ride with a stranger- or does that mean we can't ride those rides because there is not an adult guardian for each one?