we and my other half have done a 4000 km round trip in a weekend
and it was ok but alot of driving
we kept ds enetertained who is 3 with regular stops eating breaks pee stops fresh air as he gets car sick we allso have an portable dvd player he can watch which saved our sanity . toys he can play with
most of the time he slept

so i wish u the best of luck and ur not crazy road trips can be fun