As motosubatsu said, Don't Do This! I have additional reasons for saying this, though.
I have submitted 9-10 applications ... will it be perceived in a negative light if I show up at these same companies tomorrow and drop off a resume in person?
You state that you've already applied at these places, so why would applying again help? It's simple, it won't. In fact, it will most likely kick both of your applications/resumes into the "round file" faster.
If they see 2 copies of your resume, they'll most likely get rid of them both as a penalty for wasting their time with redundancy. They have potentially hundreds of applicants for this one job, so they aren't going to waste their time on someone who is actively trying to make more work for them.
You don't mention if you applied directly the first time, but if you applied via a 3rd party recruiter, you will definitely get kicked out of the running. They don't want the possibility of the {recruiter, temp agency, other people finder company} hearing that they hired someone directly who was also offered through the service. That's a lawsuit waiting to happen, as it would probably be breach of contract. At best, the recruiter will refuse to work with them in the future, and they may let other recruiters in their sphere know about the situation, too.
Also, even if you don't get hired, that recruiter will likely hear about you re-submitting your application directly and then not work with you.
Recruiters get paid by finding workers for companies. If they do work to find a company for someone, or vice versa, and then they don't get paid for it, they get mad, and for good reason. If they do this too often, they go out of business, so they are going to fight this pretty much every time.
From my own experience in Iowa, USA, looking for either a computer tech or computer programmer position: My parent's used to ask me why I wasn't out handing my resume to every company in the area. Well, for years, I was. That quickly ceased as more and more companies pointed me to a website or the 1 recruiter company they used who had their own website. Even if I offered the resume right then, they would usually not take it.
That was almost 15 years ago. Almost no one takes a paper resume anymore. I even tried putting my resume and portfolio on a business card sized CD to make it "stand out", and no one ever looked at it.
Use the sites and other online resources companies offer, as that's the only way they expect to find people, unless they know someone personally who will fit the role. Trade shows are good for networking, but they aren't looking for employees, they are looking for customers.
A hiring fair is a completely different animal. You'll likely see long lines of people at every booth, a variety of styles of resumes, and you might get 1-5 min for an elevator pitch. Unless you had an absolutely stellar pitch and really connected with the person, they'll forget you before they talk to 2 more applicants. Paper resumes may work here, but the presentation/elevator pitch is the key to getting remembered and staying out of the shredder.
Job hunting is a pain, no matter how you slice it, and there are more ways to kill your chances than to help. As someone who struggled to find steady work that didn't disappear for economic/"no more work"/"company shutting down" reasons for over 15 years, I sincerely wish you good luck!