Making conferences accessible for people with anxiety I'm looking for some information about how academic conferences can or already do accommodate the needs of people with anxiety. For example, do you know of any conferences which have special measures in place to encourage people who have anxiety to attend (e.g. related to travelling to a conference, attending conferences, presenting at conferences)? 
Or perhaps, are there any ways that universities themselves make conference attendance more accessible for people with anxiety?
Since the interpretation of the question changed I'll add an answer for the new one, leaving the old one in place in case it helps an individual. 

Some conferences have two simple features that might be adapted to your needs. The first is a "newcomers/first-timers session" early on the first day of the conference in which people will learn about what to expect in various kinds of sessions. This can, perhaps, be used to put people at ease with only minor changes. 

The second thing is that many conferences also have student volunteers who help out with various things but are also allowed to attend any sessions without fee. Some student presenters are also volunteers, lowering the cost of attendance. But one of the uses of the volunteers is to be an assistant to any presenter who requests it, handling unforeseen issues so that the presenter can concentrate on what they want to say. This might be reassuring to some people that "bad things" are less likely to happen. 

An additional advantage for the volunteer is that they, themselves, become more familiar and hopefully comfortable with what to expect at a professional conference  so that later they don't have first-timer anxiety themselves.