Hairstyles for backless dress?

I picked up my dress on Friday and I’m absolutely in love with it! I’m just thinking about hairstyles that would work to really emphasise and elevate the beautiful detail on the back🥹

I have quite long and thick hair, so having my hair all up is uncomfortable and I never have it up, so don’t really want this on my wedding day. My hairdresser said it will be completely different when styled properly compared to when I do it myself, but we’re eloping and I’m not having a hair trial so don’t want to risk it.

I’ve attached two photos of me in my dress so show my hair down and swept to the side. Pics 3/4 are hairstyles I’m considering but I want advice!

I could chop a lot off for pic #3 and was wondering if any brides have done this and whether they regretted it? Alternatively, I really like pic #4 but I’m unsure if this will be equally as heavy/uncomfortable as having my hair up?

I really appreciate any/all advice! My wedding is 3 weeks away so I really need to make a decision🤦🏼‍♀️