Ok - let me clear up one thing on this thread. It is NOT necessary to change availability to "vacation" status - it is only a convenience. So if you're going to be on 'vacation' or not play in EDS but be available for other tourneys, then don't change your availability. The only REQUIREMENT for vacation in EDS is that it is posted on EM in the first 5 days of play (or posted by DPA if you can't be there to post).
Since availability can be changed at any time, and since it also shows for weeklies and ELIC and other events, please be aware that this should reflect your general availability for ALL tourneys.
Hope this helps out.