I had a birth plan and I also think its important to have medical staff who share your philosophy if possible.
The making of a birth plan is the most important step rather than getting medical staff to read it. It helps to sit down with your partner and anyone attending the birth and going through all your specific wishes. During labour it's your support person who will most likely need to advocate for you if necessary. I would consider hiring a doula.
A drug free birth is definitely possible. I was very determined to have a drug free birth provided there weren't any medical reasons not too. I'm definitely not a go with a flow person and I think that can be counterproductive if it stops you fully researching your birth options. I found calm birthing useful as well as labouring in water (that was amazing!). Calm birth didn't stop the pain but helped me focus as well as taking it one contraction at a time.
Unfortunately there is a lot of negativity surrounding labour...and a lot of fear. I think this is why you find a lot of people are negative about your choice.