My (now 3 yr old) has been on basal/bolus from the start. This may be due to the fact that very young children quite often don't have a honeymoon period so he was completely insulin dependent from the beginning.
As for getting settled figures I would have to say it took me about a year to get really good at avoiding the spikes and hypos. Nothing really stays the same that long with kids anyway so it is a constant case of reassessing as they grow, diet changes, various activities, illnesses, etc... We still have periods of instability that sometimes can't be explained. There is always a balancing act to fit in with the family, milestone development, outside appointments, the list goes on....
My aim is to avoid as many hypos as possible and stay under 10 as much as possible. To give you an idea of what Khaleb's figures are like I can tell you that in the last week he has had 71% of bsl's in range (4 - 10 mml), 25% above range (all but one below 15mml) and 4% below range (1 X 3.4mml and 1 X 3.7mml). I use a free internet site that will graph his results. I don't really like all the record keeping and don't always do it. Good records do show where insulin and carbs aren't matching and you can find a way of flattening out some of the bumpy bits.
I wouldn't like Khaleb on a mixed insulin. He could refuse food or sleep at an odd time or be suddenly ill and I have a much better chance of controlling his levels on basal/bolus. The biggest downside is that Khaleb is on 5 injections per day. Lots of different regimes work well and it is just a matter of finding what is right for you and Dylan.
Just take a day at a time. Sometime soon you wont be ringing up to check doses and you'll manage all the everyday stuff. A bit of women's intuition and instincts go a long way too.