Could I get some advice regarding mailing a check to my bank?

This is so stupid, haha, but I’m having trouble figuring out what to do.

I have a check that needs deposited into my checking account. The ATM on campus doesn’t do deposits, and physically bringing myself to the bank or another ATM would be a major hassle.

I want to mail the check to my bank, but I don’t have any deposit slips. Do you think that’s a major issue? I could order some online, but I’d have to buy a pack of 100 and it’d be $9, and I just really don’t want to pay money to deposit money.

My dad said I could probably just write my name and account number on a piece of paper and stick it in the envelope with the check, but I’m nervous to do something like that. Do you think it’d be okay?

I’m so bad at real life.

Thanks jellies!