You can try to make some sort of mask that attaches to your glasses, or if it is an option, contacts. There are also the masks that are on sticks... you just have to hold it in place. Unfortunately, I don't have a ready/easy answer for those attendees that have glasses (one of the organizers is in a similar situation... if she comes up with a brilliant solution, I'll bug her to post it.)
Since registration has only been up for a week, I don't have any numbers yet. But as we approach our capacity, we will be sure to post so that people know that we are getting close. If it's possible, I will try to post updates on attendance before that as well.