Thanks for the opinions. Right now I'm kind of torn as to what approach to take. I've been leaning toward the lacquer/toner approach, after a shellac under coat. So I've been trying to find a dye that approaches the existing color. Unfortunately there are no local sources for dyes around here, so I have to look over the internet, and it's tough to get a good sense of what things would look like. If I don't use a toner, I'd probably use a polyurethane. I don't have much experience with lacquer, and I don't have a spray booth, so controlling dust while shooting lacquer will be challenging, but I'd manage that if need be. Basically, what I'm trying to say is that I don't see an advantage to lacquer if I don't use a toner.
So, I think I'm going to order some dye and experiment on some oak plywood. The big complicating factor is my wife. She likes the color it is now. I'd be happy with something simpler, but if I go with simpler, my life may become more complicated otherwise.
I really appreciate all your help. I didn't have any good direction prior to your advice.
I may not be fast, but I sure am slow.