I believe this is an issue with Unity 3D rather than Blender, as Unity has a 64k vertex limit for one mesh. So I simply lowered the vert count. Thanks for all your help!

Actually, they are still importing in Unity 3D as separate pieces still for some reason. Screenshot attached to the main thread.

That was it. Thank you very much! This was so helpful. I greatly appreciate it!

This works perfectly and as desired, but when I import into Unity 3D, it's showing strangely as two separate meshes and the faces are a bit messed up. Is there a way in blender to ensure it's all combined back into one single mesh?

@MrZak It appears the problem was the surface was too flat. So I extruded it upwards and the remesh modifier properly recalculated the topology. Thanks!

@MrZak When I add the remesh modifer, I don't see it making any changes. Any idea?

@CraigDJones Yes, even with a solid color it shows the shape. Even though the topology is flat. It does not do it in all areas.

@LukeD Oh goodness. That was it. If you move this to an answer I will accept it. Thank you so much!