Are you familiar with impositioning? That's what you need to do, prior to setting up your pages. The best way to explain it online, is to take 5 sheets of paper and fold them together in your booklet form (just as an example). Get a pencil, and mark how the pages will be numbered. Pull your booklet apart and lay the pages vertically as if you are looking at Quark's Page Layout window, beginning with page 1. You will see a pattern.
Page 1 (right) sits next to page 30 (left), page 2 (left)/29 (right), page 3 (right)/28 (left) and so on. Then you have to take into consideration double-sided printing when printing it yourself. It's not something you can just throw together.
There is impostion software but it's costly. Just lay it out, study it, and once you understand it in your head it's fairly easy to create a folded booklet. Also, do not use facing pages when creating your document, since you're folding it in half.
Another thing to be aware of is that you will need to trim the interior pages by a sixteenth of an inch or less per page, depending on the type of paper used - to have all the pages line up with the cover page, especially with 30 pages.
Clear as mud?