I'm hoping to visit next year spring. Whats the possibility of getting near the main campus itself? Could you get an employee to badge you in?
Unless you are a legitimate guest of an Apple employee, you aren't going to get inside Apple Park. Guests are required to register at the reception desk, receive a temporary visitor badge that must be worn in plain sight at all times, and must be accompanied by an Apple employee.
If you try to ask someone to badge you in, there's a strong likelihood that person will report you to security. Most likely, there are security guards at the normal entrances anyhow.
If for some bizarre circumstance you somehow made it inside the building, at some point you will probably be identified as an intruder, either by your actions but also because you won't have the standard credentials (employee photo ID badge or visitor badge) and because you aren't being accompanied by a badged Apple employee.
You would likely be detained by security and turned over to the police. Charges of trespassing will probably be filed against you.
And since Apple takes security seriously, your identity will likely be forwarded to federal authorities, especially since you are a foreign national.
Most likely, the rest of your visit to the USA will be occupied with rather unpleasant legal activities and at some point during your jail time, you will be visited by a representative of the Jamaican consulate for questioning.
I want to visit the old Infinite Loop campus while I'm there too.
Same. You can stand on the sidewalk at De Anza Boulevard and look at the Infinite Loop campus. They're tall office buildings (well, tall for the immediate area, not like Shanghai skyscrapers). Infinite Loop is not the Sistine Chapel or the Taj Mahal. They're corporate buildings.
You are welcome to visit the Apple Store at the Infinite Loop campus during their hours of operation.
You are welcome to visit the Apple Park Visitor Center during their hours of operation.