As still something of a newbie to LF...
It occurs to me I should be able to use Ilford Multigrade IV (or any other paper but I have quite a bit of 8x10 RB MG-IV lying around) as "film" in my large format cameras as long as all I want in the end is a 1:1 printing ratio. At least, it's a cheap way to practice and experiment as opposed to $1 a sheet for 4x5 film. And, I suppose, it gives me an easy way to use a 3x4 camera (or other odd size).
I assume I can cut the paper to size in my darkroom using a dim safelight and load the holders the same way. Any issues there?
What do I use as a speed for the paper when exposing in camera? Is ASA 6 a good starting point?
Do I need to filter in any special way, given that paper is not very sensitive to red light?