How does preboarding work?

[DTOFROMSD]

Like what I do when ai check my bags, and at the gate, and at the transfer airport, etc.

[SWDigits · Accepted solution]

You'll check your bags the same way whether you plan to preboard or board with your assigned position.

Reference this Southwest page for answers to your other questions (scroll toward the bottom of the page for the section labeled "Do passengers with disabilities get to preboard?"):

http://southwest.com/html/generated/help/faqs/boarding_the_plane_faq.html