I know they sometimes offer better-than-average discounts on the DLR on-site hotels, like 30% or so, but what is the normal AP discount for when they're NOT offering specials?
Premium is also 10%. No difference no matter which AP you hold.
OP: If you are thinking of an AP just for hotel discounts - hoping for a larger one - be cautious. Since Carsland and the new perk of EMH for DCA park if you stay onsite, they are not giving more than the 10% so far. I think they may be able to keep the hotels booked up with this new perk for maybe the first year. JMHO
Also, even before CL opened, 30% off their hotels would be surprising unless it was a super slow time of year. More like 15-20% for DLH and GCH and 20-25% for PPH. Before CL there were often public discounts/specials that were just as good as the AP discounts were.