I am Dom
Paul, I really don't think putting a notice in PRONTO will be worth the paper it's printed on. The next PRONTO issue is going to contain the redrafted constitution. I think that's enough for people to think about, if they're going to think about anything. Frankly, I don't think anyone who isn't involved in the racing one way or another already is going to show up.
Avanti would be a good way to notify people if it worked, but it doesn't, as Eamonn has explained recently. Other than that, those that are going could give their fellow DSC mates who might be interested a bell and tell them about - cheaper and quicker way to put those who need to know in the know.