I would do a dubbel, a tripel, a saison, and a kriek. But that's just me!
On the other hand, it might be cool to do a Trappist ale, and an Abbey ale, then explain the legal distinction, and see if anyone can taste the difference.
Not sure about cheeses. When I did some tours over there, the emphasis was always on the beer (and very cold shots of very bad vodka.) They served cheddar once though.
For a saison, I think Saison Dupont is the way to go. Reasonably priced here, available, and delicious to boot.
For a Trappist, I'm partial to Rochefort 8.
Great idea! I'd bid on it!