If caravan carts are going to get buffed, pay attention how they are refuelled: it's very tedious process.
First you have to fill water bags, one by one. Then you have to put them in the caravan, one by one again.
It should be like this: click on water post -> it refuels all empty water bags right away.
Click on car with waterbags, it refuels it to the max with one click.