Just for discussion...

Traditionally, the SSA convention is in the dead of winter. Presumably, the logic is this is when little else is going on in the soaring world so it won't conflict with more important activities like flying. It's also when off-season hotel rates are their cheapest. Flight demonstrations have never been part of the SSA convention so weather is not a factor for that.

While mid-winter makes sense, it often results in weather related travel problems for the members attending. IMHO, it would be better to schedule the Convention in mid-fall after the flying season is over for most of the country. Or, if that doesn't work, schedule it in a location known for good winter weather. Many people in snow country would welcome a warm weather break.

While I don't know of a location with convention space on an airport where flight demonstrations would be possible, that would be nice.