My kids will be 5, 3 and 8mo old. I know that my DS 5 gets tired too, so it wouldn't be fair not to have a seat for him too. We do have a front to back double stroller & we'll be driving down, but even folded up the thing takes up a ton of room. So we're not committed to bringing it. Last year we rented a double from www.abbf.com & that worked out well, but of course we didn't have the baby then! Any suggestions? Would like ones that are as uncumbersome as possible, but want the baby to be able to lie down. Thanks!