I'm currently at Purdue so I'd be happy to answer any questions you may have about the area via PM.
I really like the area, but there's not a ton of things to do. Although this hasn't been much of an issue for me as I generally stay very busy. It's a really good town if you like outdoor activities, as there's practically unlimited space. All in all, it's a very chill place and good for relaxing in down time.
There should be loads of places to camp...I know Turkey Run is fairly popular and I'm sure there are other places even closer. As I said, there's plenty of space for outdoor activities. Decent bike paths, lots of golf courses, huge open fields for sports...etc.
As far as restaurants: Triple XXX (burgers/fries), Von's Dough Shack (calzones), Mad Mushroom (best/greasiest cheese sticks ever)
There are others, but these are my go to's for comfort food.
Weather is fairly unpredictable. Within the past week is has gone from about 20-60F. You will definitely be experiencing all four seasons. The key thing in the winter is the wind. Make sure you have clothes to break the wind. We do have quite a bit of snow, but skiing isn't fantastic due to the terrain. There is a place called Perfect North that students make trips to, but if you're from a skiing area it won't be what you're used to.
Overall, I like the area. It's very chill and relaxed, which is good when you're trying to focus on school. But it's very easy to get away to Indy or Chicago for a day for shopping or as a cheap getaway.