According to the Regulations Status and Transfer 2010 document, Craigan requires to be with the Northern Ireland squad 4 days before the match (five if it is a double header), while Randolph requires to be with squad 48 hours before the first match. Not took a proper look at the fixtures but if either have a game at the weekend then no, they could not be available the day before or that. Saying that it does say special disposition can be given but players MUST be there 48 hours before the match.
So I'm not sure the 22nd would be fine as not sure they play at the weekend too, although we'd be defo missing Gunning and Saunders.