i'm sure it will go smoothly since she is a good sleeper anyway. we've never had any trouble with my LO moving rooms. have you travelled at all with your LO? mine will go to sleep in any room in any playpen as long as she has her loveys and her blankie.
try to keep everything else the same - routine, lovies, bedding, bed etc and treat her the same in her new room as you do now when she wakes up in the night. no different attention so as to avoid AP.
i'm sure it will go well.