I will suggest two steps:
1) In your personal computer with Adobe Acrobat, save your commented documents using the following option:
a. "File" ---- Save as Other " --- "Reduced Size PDF" (this will make your files smaller in size, more portable)
and then, save again, the same reduced in size file like this:
b. "File" --- "Save As Other" --->"Reader Extended" --->"Enable More Tools" (this last saving method will allow you to print, fill & sign, add comments, and save a copy using Adobe Reader (to include older versions of the Reader)
2) Then download the free Adobe Reder from this links:https://get.adobe.com/reader/otherversions/
Make sure that before download, that in the computer that you will be using for scripture class at the state prison, that you can confirm the minimal system requirements and the operating system.
a. Copy the downloaded off-line installer to the USB drive
b. Copy your "Saved As" PDF files onto the USB drive
c. Arrive early on the day of your class, as you will have to plugin this USB key on that state prison computer, run the installation and setup program, and test if it works (you don't want to look bad in front of a class.
NOTE: If I were you, I would do this the day before so that on the day that you instruct the class you can jump straight into the scriptures with comments with no delays and no issues. There is nothing worst than having an audience waiting for the speaker to fix and troublshoot crap with a computer; it does not look professional (your most valuable asset here is the scriptures, make sure that the computer that the state prison is lending you is not gonna make a mockery out of you in front your audience)