We had a Maytag/Whirpool stackable washer/dryer put in ours. Dryer is vented. One of the best options we have ever added.
While I do reccommend a washer/dryer, I will never have a Whirlpool again. Have been trying to get warranty work done on washer and can't get it serviced. Whirpool says they don't have to service it since it is in a RV closet. I have to take out of RV before they will work on it. Customer service went as far to tell me that it was up to me to find a service company to work on it, not their responsibility.
Next rig will have either Spledide or LG in it. Never have a Whirpool again. But it will have a washer/dryer.