I don't currently have a reentry permit.  I would rather not go all the way out to Chaeng Wattana to get one.  I understand that it is possible to get one at Suvannaphumi Airport.  Can anyone answer the following questions:

 

1.  Is the immigration desk that issues the reentry permits at the airport open 24 hours?

2.  We are flying out on Monday very early.  Seems too risky to put it off until then.  If I go to the airport on Friday will I be able to get the permit then?  There is no requirement that I have to be flying out the same day, is there?

3.  Can I get either the one-time reentry or the multi-reentry  permits at the airport or only the one-time version?

It's after check in and security so you cannot go in advance to get it.