Currently we use the Reunion Order form as our source document. Would it be possible to allow more lines to appear per page when we print this out? Right now, I think after about 5 items, it spits out a second page. Just trying to be "green".

No, too many variables. How a web page prints depends on:

1) What you have on the page
2) Browser you're using
3) Printer and printer driver
4) Any other print settings you're using

I'm not sure exactly where yous is cutting off, but is there some large element at the top of page 2, such as a comments box or large image or anything like that? If so, the printer will bump that whole area to the top of page 2 rather than cutting it off, thereby leaving a large blank space at the bottom of page 1.