First off... Congratulations on moving to college!
I'm also a college craftster
I live and work as an RA in a dormitory complex which houses approx. 700 people... and I am not the only craftster! During my work as an RA, we do mid-semester room inspections (looking for hazards, violations, etc.) and I have come across quite a few sewing machines and knitting bags on resident's desks.
I am in a really fortunate position that I have a single room (part of my employment compensation) and our rooms are quite large so I can pretty easily store my fabric stash. Also, with a single room, I have two sets of furniture, so I have a spare desk for my sewing machine and serger.
If you're living in a double though, you'll probably have to sacrifice your desk space for your sewing machine. If you only use your computer on your desk, there are handy laptop carts available at target/ walmart/ etc. for pretty low prices.
I also bought a TV stand for the TV to clear up my bedside tables as surfaces (I have fish that need somewhere to live, but you could put a laptop on those, too.
Our dorms have wardrobes which provide pretty good storage, and are just the right size to store an 18gallon rubbermaid box on top. I stash my fabric in two of those and store them up top. They're out of the way and the fabric is safe
like ^^ said, A LOT of dorms have adjustable beds. Some (mine not included) will allow you to bunk or "loft" your bed, and put your desk underneath it. If your college has beds like that, go for it! It opens up a huge amount of space in your room. They may also have adjustable beds that rise up to about boob-height (go with it) and provide a lot of storage space. We have them, and I can easily store several three-drawer units and a few rubbermaids under there. You might consider calling your college's housing office and asking them what type of beds they have. If they're not adjustable, you can buy bed risers at most stores, they're a lifesaver for storing stuff.
Also, from my experience as a student, and as an RA to first-year students... you WILL have spare time. Most of my freshman don't know what to do with all their spare time and many find themselves getting into bad habits like sleeping or playing video games all day. This is why most colleges have first-year interest groups/ clubs and encourage their students to get involved on campus. Using that time wisely is a huge determining factor is a student's expected college success. (*babbles about student development theory, statistics, etc*)
A lot of students also have trouble with understanding their role and feeling like they have a solid identity in college. Being in a new environment (I also chose an out-of-state school) with a whole new group of people... I didn't know where I stood, or how I fit into the community. My sewing REALLY helped me through that. I was able to fall back on my sewing ability as my identity when I was unsure of myself, and through that, I felt like I had something to relate to and interact with other people (even if some did just ask me to please hem their favorite skirt that their roommate had trashed). I got over the uneasiness and found my place. I'm not sure what I would have done without that.
It's a great way to meet people, too. I made a skirt (simple, A-line knee length skirt) out of super-eye catching piano key fabric, and every time I wear it on campus, someone asks me where I got it. "oh, I made it!" ... "oh, really? that's awesome!... etc"
So... (back to the point!) take it with you! It's a shame to leave such a big part of you at home.
Good Luck!!!!! If you have any questions or just want to chat with someone who is/ has been there, PM me!