I would recommend:
DVR heading 095 for 24 nm to KONAN
KONAN heading 095 for 25 nm to KOK
If high enough, the time that you are not within gliding distance of a coast is limited to around 15 minutes. You might want to check your insurance papers (aircraft and/or personal accident and/or passenger liability) how they feel about this. Don't forget the life jackets.
Check NOTAMs to make sure, but usually EBFN will not be active during the week-end. Sometimes the military have some joint activity (paradrops / aerobatics / etc...) with the French at some of the smaller fields across the border, but Ostend Approach would advise.
You can (after registration) get all the info you need at
Belgocontrol - Operational
EBOS is +/- walking distance (1-1.5 km) from the beach. Enjoy !