I know where you're coming from regarding discount, but I agree with Steve here. Its not likely to be a great amount (i'd guess maybe a fiver a night so less than £20 saved) and its not worth making Jacqueline think we're not already grateful - for the saving, i don't think its worth leaving that negative vibe.
I think the cost of the hotel isn't actually bad (about £60/night in good old sterling). Its the beers and fuel that made it expensive last year - but hey, thats half the fun of it