I'm really hoping that the lodges are the same amount of money as a hotel room! Probably not knowing Merlin
I don't even want to start on that subject xD
I wouldn't expect these lodges to be the same price as hotel rooms. They have already been confirmed to hold 5-8 people, which will raise the price of a stay. It is also likely, from the concept images, that luxuries such as hot tubs could be included.
If so, I think you could make a sensible estimate of £50-100 more per night than a room in the hotels, depending on the time of year.
Even if this is the case, I think they'll be popular. I for one, cannot wait to stay there!