I am pregnant with my first child and I want some realistic advice here.

DH and I love cycling and we really love riding our tandem. However we now live in a different country to both of our parents (been here for a little over a year) so we don't have instant babysitters.

I was wondering how far can you realistically cycle with a 9 month+ baby in a baby seat on the rear.

Here's the conditions we would cycle-

Baby would have to be well and not sick
Weather would have to be suitable
We mainly ride off-road concrete bike paths at the moment anyway so we don't go very fast anymore, plus also don't do steep decscents
We currently are coffee shop breakers. We normally ride 20-30km and stop for coffee and snacks.
We normally do a total distance of 60-80km in one ride (so possibly stop twice or more).
I currently wear a Camelbak so am OK to wear a larger Camelbak to stash baby stuff.

So am I mad to think about riding with a baby so young? I realise we might have to slowly build up distance and time so the baby can get used to it. Or are we simply best to find a babysitter and leave baby off the bike until much older?

We have vetoed a trailer for the tandem as it makes it just too long and some of the bike paths have nasty chichane things to get through.