There exist today ground stabilization fabric materials that can laid under stone sub base materials in wet areas that may solidify the sub base itself. Product will stick is fairly expensive but may allow installation that are of a driveway where it would not be possible other wise. If placed directly on the earth below the sub base and within the wet area, once the sub base material is correctly compacted the surface will support a good price more weight without and shifting or movement. Many masonry supply stores carry these textiles. It will take two people to roll out and handle the fabric as usually comes in twelve foot wide throws. A local excavating contractor may a few smaller rolls to give. Give them a try as well.
Pay importance to your drainage system, not that water can harm your pavers