[Hotrodhornet]

It may be dependent on geography, but the parks with pavers that we have visited seems to have more problems controlling ants because they come up between the pavers, than the full concrete pads.

The storage lot I was keeping my coach at had that type of surface , after a couple of months of use it started to push the gravel out and made grooves so deep that my step would rub.
I suspect that the base was giving way and was not properly installed. Paul