Well 3 days isn't long enough but...
From Ostend my suggestion would be ignore LeTouq and push onto Deauville - much nicer and if you have to overnight Honfleur is rather pleasant.
Along this coast once of the bigger issues is sea fog. Your alternative is this either quite a long way inland or maybe even back across the Channel.... So it elps to be well prepared.
Suggest you try nav200.com - excellent flight planning site which school boy French will get you through.