My toddler (21mo) loves her car seat. Only trouble is if we have a family day out she will sleep all the way there and back. I feel terrible complaining about her being so good in the car as know lots aren't.
The morning nap isn't a problem but if she sleeps after about 2pm it really messes up her bedtime. She will be awake (but grouchy) until gone 10. We love our days out, but me and DP get anxious towards the end of it, knowing she's going to be out of kilter in the evening. Even a 20 min afternoon nap seems enough to keep her up till half 10 
Her sleeptime (though baby led) would normally be:
7am wake up
11:30-12:30 nap
8pm ish bedtime
But if we go out around 9am in the car she will sleep straight away. Have tried leaving later and she still squeezes that afternoon nap in on return journey.
So what can we do??? Just stop any travel after about 2pm?
I have thought she doesn't seem to sleep much for her age but if i try to get her to settle any earlier she gets really cross and seems to stay up even later 
Please help!