also the question is if was meant the district Kufstein or the capital (samenamed) of this district. i do not really know about a camp, so if then it was not really a big one.
interesting also that only the english Wikipedia has this info (maybe the german info don´t like to show it to much that they had such a camp.....):
http://en.wikipedia.org/wiki/Kufstein
http://de.wikipedia.org/wiki/Kufstein
why don´t you ask at town-office in Kufstein directly if there was such a camp or if the marriage would be stated there: http://www.kufstein.at/system/web/kontakt.aspx?menuonr=21850...

how i said - there is the english info about Föhrenwald camp in Ellmau, Kufstein, which is not correct. as we know it was meant Föhrenwald south of Munich - so there is also possibility that the english Wikipedia based its info also on that. fact is that i don´t really know about a dp-camp in Kufstein directly, but who knows, maybe you get more info so you can figure out more.

"When you take into account the Austrian/Serbian conflicts throughout history AND how the Polish people were treated during WWII I am confused as to how/why they ended up alive, married, and with a family…all in Austria? "
often specially very young people were delayed from their countries to Germany and Austria to become Zwangsarbeiter/forced laborer there. maybe that happened to her and he possible was a prisoner of war? but the marriage makes confusing. think it was not allowed that time for such people. it would be of interest WHEN they married in Kufstein. think then after war. many mysteries.....
http://de.wikipedia.org/wiki/NS-Zwangsarbeit
http://www.claimscon.org/?url=austria/forced_labor
but i also know about people from "Yugoslavia" and other "hostile" countries who fleed at WW2 and ended up in DPCamps in Austria.

i had once a neighbor-woman who was taken as a young girl maybe 14 or 15 by the nazis from Ukraine and she had to work in Austria. interesting is that she later after war married just such a man. but that´s life....