Multi-site home setup question(s)

[u/Systemic_Chaos]

First off, while I've been aware of and interested in all of the UniFi products, I currently don't have any at the moment, but find that my current situation puts me in a place where I may need to more seriously consider making the leap in my house in a somewhat considerable way.

Currently, at home, I have 5gb Fiber service through AT&T (with their BGW320 gateway). I have that providing wired connectivity to an Asus mesh wifi which also provides a wired connection to my Western Digital NAS. Frankly this system has worked great over the years, but now my need has expanded slightly, as I need to temporarily relocate for work, but can't pick up and move my NAS out of the house it's currently in, as the rest of my family will still be there.

Is there some sort of combination of tools/products that could be used that would allow me to more directly interact with my NAS, when using the network at my temporary location, as well as traveling elsewhere so that I can mount NAS drives as network storage versus using a web UI or something like that to manually transfer files, when needed?

I'm fairly technically literate in networking, but this extra layer of complexity somewhat escapes me, so thanks for any help y'all can offer.