I think we've had 3 year-long extensions. At first, I never thought to ask for a year, but then I read that some people on this site asked for 6 months and were just given a year. Since the application probably takes about a year to be processed, that makes sense since they'd want to let you stay until you get an answer on the application.
As you've be told, you can "flagpole." If you have anything to bring over that might be subject to duty and taxes, you have to at least present a list of those items at that time or have them with you along with the list so that you can bring them in duty-free.
The main thing they are looking for is a copy of the receipt saying that you have submitted the fee. We also printed out a draft copy of our forms and photographs and travel receipts that were part of our relationship proofs. The first time we came across, we had an insane amount of his stuff in the car (which thankfully they didn't decide to look at). They kind of flipped through the application, but didn't really llook at it. It's not their job to evaluate your application in any way. Their job is only to see if you're admissible as a visitor and will likely return to the U.S. at the end of your visit.
They would like you to be already married and have already sent in the application at the time that you come to visit, though many people visit with the intention of filling out the paperwork together. The officer we encountered wasn't much impressed by that way of doing things. She told us, "You're doing it all backwards."
So long as your husband can vouch for you and state that he will support you during your visit, that will be fine. I've crossed by car with my partner and done this verbally. Once when he landed at the airport, they took him aside for questioning and seized sweet potatoes he was bringing for Thanksgiving dinner. (Don't bring root crop with you ever!) They phoned me just as I arrived at the airport to pick him up and asked a bunch of questions about whether he was really staying with me, how did we meet, what was our relationship, etc. Since our stories checked out, they were fine with it, but it was rather traumatic for him.
To get the VR extensions, I had to submit a statement of where he would be staying and that I would support him, and statements of income, bank statements, etc. Once you have a VR, they don't have to ask a lot of questions, because I already submitted various proofs to get the VR. Actually, the last time, I wrote in the letter that I had included bank statements, but forgot to put them in. I was worried, but I guess they didn't find it a problem because they approved it. I've been supporting him for 4 years now, so I guess they had no reason to suppose that would change.