I doubt you're ensuite has enough room for a bike and you to move freely around in. Just take it down if you have enough car space, don't worry about being caught either. I bumped into the halls people several times with my bike on the way out and I just said you didn't see me and they said nope we didn't. I haven't been warned or anything either. I don't know about your halls but mine had a shared bike shed thingy. There was about 50 bikes in there, behind one locked door with multiples of the same key being handed out to whoever used the shed. One of my friend had 3 of his bikes robbed, got a new one from insurance but got robbed again. I kept my shit bike in there and my mod in my room and I still have my shit bike. I've only had 2 room checks in my first year and they don't come and look in your room when they want. I know some halls specifically say no bikes in your rooms but they also say no smoking, none of my friends has been caught either.