I'm looking for some help from the forum to set-up JMRI operations for my layout.

My layout physically consists of one large industry with multiple spurs operated by a local switcher from the industry and an 'interchange' with a Class I railroad that is actually my staging yard. 

I want JMRI to develop a switch list for my industry. I want cars to move from the Interchange to the spurs, back to the interchange and have their loads switched.

What is the best way to do this virtually in JMRI:

My small switching layout is running like a top, driven by car cards and waybills.  I've been reading the docs on JMRI OpsPro for quite some time, trying to determine if I would like it and make the switch. 

OpsPro is complex, with lots of configuration options and I know this would be a "learn by doing, the doing again" experience for me.  I operate my layout almost every day and was reluctant to disrupt my status quo.

I've been going through old timetables, which I find fascinating. But they only list the passenger trains. Where would scheduled freight service be published? I would have thought in the employee timetable, but that doesn't appear to be the case for the two that I have.

I don't collect much railroadania, but I know there is a special love for station agent stamps which, if I correctly understand, were for sealing the company receipts and were shipped to the home office. 

Seeing that it is possible to get a wax stamp made, I am wondering if anyone has ever found a use for such a thing? 

I just think wax stamps are neat.