If you use the hole wizard, you do not have to create the reference plane, just select the upper surface & it will add each hole perpendicular to it. As you've experienced, there's no good way to pattern this to get the results you want, but using the hole wizard will at least make all the holes one feature.
Strangely, if you click the surface & then add a point directly to one of your Sketch4 (Profile curve points) it won't create the hole. But if you create a series of holes (as described in the 1st sentence), hit "OK", then go back & edit the Hole Wizard sketch, you can drag your points to the Sketch4 points constraining them to the desired location.
This is the same problem I've ran into putting hole wizard holes on a cylindrical surface...
When you place the hole wizard hole directly on the point in a 3D sketch Solidworks doesn't seem to know which tangent face to be perpendicular to. If you place the holes on the wing surface and then go back and edit the sketch to put the holes coincident with your sketch it should work