Domanda e risposta Madrid

Hi everybody, hope some of you speak english i'm planning a visit in spain with my mobile home. i would like to spend 3 days near madrid and have the possibility to get to the city by train or bus i've seen many camping site and opinions, most of them are very bad camping, dirty etc. this one is the best until now, but they told me that the campsite is 3km far from the train station aranjuez and there's no bus from the camping anyone of you visited madrid? how do you get there? thanks a lot