I'm looking to build and operate a wooden pinhole camera, roughly the size of my truckbed. Needless to say, that makes the potential film size very large. I'm planning to use photographic paper instead, mainly to save money. Now, I have a few questions for those who have built large pinhole cameras.

1st: What should the pinhole be made of? Due to the size of the camera, I'm not limited to a tiny pinhole, but from what I understand, material does matter.

2nd: What's the best way to load/unload the camera without having to light-proof my garage? I'm thinking giant film holders, but I'd rather keep the design simple to avoid smacking my head against engineering flaws.

Thanks in advance. I know this is unusual, but any experience from others is appreciated.