it will be ok---how are you quilting? by hand? by domestic machine? by long-arm?
i've had many batts with creases- as i smooth it out and create the sandwich the creases just relax- i've never (since 1976) ever had a quilt come out with an obvious crease from the batting-
just smooth it out and go ahead- it will be ok
i do know a lady who (always) unfolds her batting and puts it in her dryer- and fluffs it---works for her- too much work for me :)