Steampunk Lady Explorer

Our lovely friend C and her fiancé have invited us to their steam punk themed wedding next April. The dress code says Steampunk optional, but of course I'd like to join in!

Having had a bit of a look at the women's costumes I've decided that I am neither Victorian lady nor harlot so plan something of a Lady adventurer look.

So I thought this would be a great use for this UFO I finished off last year but barely wear

Then add a blouse with some frilly collar and cuff components 

And a long skirt (or culottes/divided skirt) with cargo pockets or buckles or some such

Then practical boots and lots of leather accessories, as well as some sort of hat and goggles....

I plan to customise this bucket hat I made in September 2002 with steampunk doodads.

Any suggestions for accessories I can DIY (I'm fairly crafty) to complete the look.
If possible I'm hoping to sew or make everything, or thrift things and adapt them as I'll enjoy the challenge and have plenty of time to get prepared.

Apparently we'll be in a marquee outside the Papplewick Pumping Station.
https://papplewickpumpingstation.org.uk/weddings.html