When did you or when do you plan to stop using your travel system and start putting LO in the stroller?
My overly happy baby girl!

I'm a breastfeeding, baby wearing, cloth diapering, co-sleeping, anti-CIO Mommy
Raising BeanWives Unscripted
Married my hero on 10-11-08
Our bean was born on 05-19-11
Re: carseat/stroller question.
We bought our travel system long before the baby was born, and I never even considered babywearing at that point. Now I wear him whenever I can and we've only used our stroller once on a walk around the neighborhood. I don't foresee us using our stroller again unless we have two kids close in age, I'm already wearing the small one, and the older one is tired of walking. It's a pretty specific scenario, but we'll hold on to the stroller just in case, since we already own it.
Oh, but to answer your question, kind of - on that one walk we took when DS was about 3 months with excellent head control, we just used the stroller without the carseat.
I'm a breastfeeding, baby wearing, cloth diapering, co-sleeping, anti-CIO Mommy
Raising Bean
Wives Unscripted
Married my hero on 10-11-08
Our bean was born on 05-19-11
I got a stroller that fully reclines and have used it since he was a newborn - but usually only if we're walking from home. For out and about, I'm still using the snap and go or the ergo.
I think you're fine to do what works, as long as the head isn't flopping around.
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Since 8 weeks? I take her out of the car seat a lot and put her right into the stroller (did that today at the park.) Is that what you mean? Otherwise I wear her. But the stroller has been so convenient this summer, especially at the pool
Oh, and my DD is really wanting to sit up and look around. I like my Chicco Cortina stroller because of the awesome recline options on it. I'm glad I stuck with the entire travel system through both kids. (I almost sold the stroller a year or so ago