Now after the marriage, I will hold her until my arm falls off if she will let me. It sounds quite appealing frankly.
Only person I can imagine who finds the idea of an arm falling off appealing. Guess that's one way to lend the future Mrs a hand.
Anyway for a more serious answer to the OP
I definitely grew up during the heydey of the courtship and purity movements in American youth groups. And for the most part, I think they had the effect of making some of us too stressed to start dating and others too quick to get married because they really wanted to have sex with each other. So my first bit of advice is avoid the labels and try to be specific about what you're asking for and expect.
Personally, I've mentally adopted what I call the one dinner rule. And that means I'm trying to be open to being willing to agree to go to one dinner with most any guy I already know. I'll drive myself and if it's miserable I've fulfilled my agreement with no further obligations or if it goes well a second dinner or other activity is a possibility. But these are all public activities and I may well reserve the right to meet him there. If things keep going well at some time we'll have to have the okay now that I've gotten to know you a bit, this seems like it could be a good partnership let's go officially exclusive and see if we can work out the details.
As to chaperones, I think there are better ways to avoid temptation. Frankly a guy wanting to bring his buddy on a first date would be a little concerning because you can easily imagine a story where two guys gang up on an unsuspecting girl for nefarious reasons. When things are just getting started it shouldn't be too hard to keep all interactions in a public setting to avoid the temptations of being alone together. After that it's probably a good thing to talk about and plan together about how you want to have a pure relationship (and exactly what that means) and build into the relationship that giving into temptation together not only hurts you but let's down the one you love.
But then again I'm about the least romantic most practical girl you'll ever meet and my dating life is as non-existent as my romantic sensibilities. So it's a sound theory but pretty much untested here.