I just returned from Port Orleans Riverside last Thursday, July 28th.
Yes there are hair dryers in rooms, along with refrigator.
This is a GREAT resort. We have a room in building 14 very near everything. Riverside has the best pool for kids of all the pools. Also get the meal plan. We did and think we save 100's of dollars. Prices are the same whether you have meal plan or not. My wife and I had supper on night without daughter and grandkids. Our bill was $117.00 meal plan paid for it.
Any questions feel free to email me.