I don't think still riding necesarrily means you give your children a lack of attention. I know for me the hour a day I got to go spinning was a life saver, a little time for myself, after all I was on call 23hrs of the day and it meant that I was a whole lot happier about those 23 hrs.

Forgot to mention before, lots of people use those trailer things but I HATE going uphill with them, they kind of pull back on you in a chuggy way. Really irritated me, but maybe it was just the one we borrowed. Now bought a Britax Jockey seat and am very happy with it. Works once the baby reaches 9 kilos, she's got her little helmet and away we go. More than about 2 hrs is out of the question, but it's better than nothing.

Hiking is great particularly when they're tiny. The back packs only work once they can sit alone (around 6 months) but try a sling like one of these http://www.hoppediz.de/EN/index.htm
get one anyway, keeps babies much happier than pushchairs!