If I read between the lines, it seems like you are going away to school and will be in a "dorm" situation that doesn't easily lend itself to keeping a lot of fresh produce on hand.
If this is the case, then certainly Real Lemon would be an acceptable substitute. It may not be as good but would probably be better than nothing.
"I must say as to what I have seen of Texas it is the garden spot of the world. The best land and the best prospects for health I ever saw, and I do believe it is a fortune to any man to come here."
Davy Crockett, 1836