Hi Prettyclouds,
My husband did not have an issue with me breastfeeding or how i wanted to give birth. But from the start, he said he did not want to come into the room while I am giving birth. He is a bit squeamish about blood, and did not want to see me in pain.
I on the other hand wanted him there for his support. We went to Hypnobirthing classes (he initially said its soo airy-fairy), but after the first couple of sessions, was adamant that he will be there when the baby is born. The difference was he realised that birth was not painful!
My husband is also very close to his parents. We now live on the opposite ends of the country, but he will speak to them everyday! and they call my 3-yr old about 2-3 times a day!
When my LG was born, I went to mum's house and my in-laws live 2 mins away, so they came to visit often (at least twice a day).
Initially the breastfeeding was difficult as I really did not want to pop my boob out infront of his mother (my father in law stayed in the lounge until he was called), but she would not take the hint that we needed privacy (and I figured its only my MIL-at least I know her!!)
I had to just keep reminding myself that they are just trying to help. Take what advise you want, and if you dont take the advise, and what you do doesnt work-whats the worst that happens "I told you so" "you should have listened"... In one ear, out the other

I have broached the "you dont need to speak to your parents so often", etc - it did not go well. So I kinda just left it, and he seems to have grown out of it.
I also felt that my husband wanted me to do things like his mum (I now seem to be much more like her in some ways, and he doesnt seem to like it).
Just a random question-did your inlaws come to any gynea apps/scans?
I have a friend who did not want to know the gender of the baby. Her MIL did, and the gynea actually told the MIL without telling the parents. That would have drove me insane
Breastfeeding while we were out was not such an issue-most shopping centre's have much better feeding rooms, or I would go to the car. I also tried to get a mini-feed in before we left home or leave home shortly after a feed.
The excuse of not being around visitors as you have to BF is great, but it only lasts for 20-30 mins so you cant hide in the room for very long!
My suggestion: tell him about the benefits of breastfeeding (but in small packets of info) "i was talking to a friend who breastfed until 18 months, and the kid only had to be put on antibiotics well after 2yrs old!"
Propose that you just give breastfeeding a try-if its not working out, you can go back to formula. You just dont want to not even try...