I assume you have located the source of the water leak and sealed it already. Water inside a laminated wall will remain there until the wall is opened enough for the water to evaporate. Depending on how much you value the trailer, I would remove the window (inside a garage is best) and expose the wall edges so at least some water could evaporate. Once you feel the wall interior is dry, you may find some tips and advice for repairing the "bubbles" in the wall at this website
2000 Winnebago Ultimate Freedom USQ40JD
, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"