First of all, a huge congrats on the 65 pounds - that's great!!
There were a couple of things that helped me back in college - I was actually down in the 160s back then.
1) Energy bars can be really great, as long as you consider them to be meal replacements and maybe supplement them with a piece of fruit or something. Some of them are pretty high in calories and nutrients, so they can almost stand on their own.
2) Other things that travel well - apples and oranges, almonds (or any kinds of nuts you prefer), dried fruits (I like apricots), pretzels, granola bars - can be really helpful for the times when it's so tempting to grab a candy bar instead.
3) I got an insulated lunch box that looked exactly like a purse, so I was able to put my wallet and stuff in my backpack and carry cold foods around with me most of the day. String cheese, yogurts, peanut butter sandwiches and pita with a small tub of hummus always did well in there.
4) I don't know what your situation is like, but my program had it's own building with a small kitchen and refrigerators, so I could bring leftovers or frozen Lean Cuisine meals and store them there. If your program doesn't have something like that, some professors have mini-fridges in their offices - if there's one you get along with really well, he or she might be willing to let you stash something in it.
And I'm sorry - I don't know much about eating gluten or dairy free, but hopefully you can figure something out that works!
Good luck