In my experience bike stands are useless when trying to load 10+ kgs on a child seat - and I have a lot of experience
This goes for a sack of potatoes, but it is even more true when the load is wriggly and rather precious.
I used trees, walls, my legs, my arms, the hip-swing-get-those-legs-in-and-go, but never never ever the stand.
Ah, that is like ancient history now.
We have progressed to a trailerbike -- and basic panniers for the 10+ kilo load.
Actually, in my experience bike stands are useless. Full stop.
Is that just me?