I think a triplet stroller is a MUST. Even with no other
children, having a double plus one in the carrier would be
extremely difficult sometimes. I'm thinking stuff like diaper
changes for the ones in the stroller while you have one in the
carrier, Costco or somewhere that you'd be lifting something
substantial, etc. It probably wouldn't be a big deal most of
the time, but there would definitely be times that a triple
would be way more convenient.

I have a triple decker that I love. I take the babies (and my
3yo and 5yo) grocery shopping and to Costco, the park, zoo,
etc. I would go nuts if we had to stay home all the time. The
triple decker is super easy to take out and about and the
carseats attach right to it. It is long and the front wheel
doesn't swivel (they SERIOUSLY need to fix that design flaw!)
but I find that its surprisingly agile. I do plan on getting a
Baby Trend triple once my trips are out of the infant seats.
That's also an inline stroller.

As with all parenting, take everyone's advice with a grain of
salt, you'll quickly figure out what works best for YOU. Good
luck with everything!

Morgan
M 17yo
J 5yo
C 3yo
GBG triplets born at 29wks in Jan 2011!