Hi, I just posted a replay on a different thread about my wonderful stroller, but here it is again.
Do both. We have a Instep stroller that is also a back pack (we got it for 50 at Target, but I have seen it for around 70 on line and other places.) We took our DD when is was 8 1/2 months and it was great. However there is a weight limit on it so I would look into it.
It changes from stroller to back pack carrier really easy and is a comforable light weight stroller that does not take up much room. It has a basket under if and a shade that comes of if you don't need it. It hold her more upright then a normal stroller, but she really liked it and was able to sleep in it also (exspecailly when on her dad's back.)
We had a great trip with it and feel it was worth every penny. I hope we can use it again this next trip March 2003, but she might be too big (it still works now, she is 18 months old and 19 pounds.)