Love diving both Vodelée and La Gombe....we usually to Lillé in the morning have steak on stone for lunch and then head over to La Gombe....but because of the need for reservations at both places, diving there requires a bit more planning in advance than most of the other sites in the region.
Have you been to La Rochefontiane? or Villers-2-Eglisses? Lots of tech divers seem to like La Rocherontaine because it drops down below 50m in one area, and V-2-E is always interesting to dive.
La Roche doesn't require a reservation, nor does La Croissette (Vodecée). Lac de l'eau d'heur is always a good standby for bubble blowing time as it is easily accessible, inexpensive, and good for a wide range of abilities. Floreffe is another nice spot although it is relatively shallow...there is a glider and a cesna (I think it is a cesna) sunk in there. Dour is close to the house but rarely dive their....thought about joining the club that manages it which would make diving there free and provide me another option for filling my cylinders for free but I have not gotten around to it yet because of preoccupation with school.
Regarding your comments about DIR setup, I dive a single backmounted cylinder but have adopted the BP/W, long hose, and octo on a necklace because it made sense to me as well. I see lots of different configurations among the rec and tech divers at all the sites here in Belgium....as long as the setup makes sense and is functional for the diver and their buddy then its all good.
We will have break from class for a couple of weeks in March....if you would like to get together for a dive or a beer give me a shout.
-Z
Still a lot of dive sites to discover for me
I hope the club will put some nice spots on the agenda this year.