I'm using a Thinktank Backlight 26L when I'm going on trips, but that might be overkill for you.
https://www.thinktankphoto.com/collections/backlight-series/products/backlight-26l
Just check around their website and see if you can find something you like. I'm very happy with their quality.
As far as tripod, I'm using an Induro GIT404XL. Again not very packable, but they make smaller ones you might want to look into.
Oh and congrats on the camera purchase!
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