In a few months I will have a 17 month old and a newborn. I can't decide what to do about the buggy situation. If going out with just one it will be no problem but taking 2 on my own??? I thought about one of those boogie boards (I think that's what they are called) but that won't work for when we walk our rural lanes trying to keep fit. And what if older baby is tired and wants to sit back. Can't help but wonder if I should just sell my single travel system and look into a double buggy. Would only need 1 new infant car seat for it. Could keep my lightweight single stroller if I popped out to town with 1 so I would have a single option if needed/wanted. Any ideas welcome 
What have others done? Anyone found a good solution if you are in a similar situation?