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OP: for this kind of trip, try to go as light as you can. Avoid superfluous gear, "just in case" stuff, campsite comforts and lots of spare clothes. Have a look at people like Chris Townsend, Cam Honan and Andrew Skurka as an introduction to distance hiking gear, watch some youtube thru-hiker pack lists and be absolutely brutal with your shakedown. 2kg will make a big difference over hundreds of miles.
Shelter:
Ignore cuben fibre, it has high packing volume, no stretch for tight pitches, noisy in rain and very poor abrasion resistance, so a poor choice for a stormyworthy tent (but great for tarps).
If it's going to be windy, a pyramid tarp tent is the best wind-shedding design for the lowest weight. Silnylon and silpoly are the most common and best light options with minor differences (poly: UV resistant, dries faster, lower abrasion resistance). Options:
>MLD solo/duomid
>Piolu Tipik
>Zpacks plexamid (+ other various designs)
>Aliexpress Knot ~360g (the smallest one)
>LiteWay PyraOmm
>SMD Gatewood Cape
>Seek Outside Cimmarron
>A-luxe mini peak
>MLD Trailstar (or chinese clone)
Use a Duck brand Polycro groundsheet, sheet of silnylon or tyvek housewrap to keep your stuff dry and clean. Put sticks and rocks underneath the edges in rainstorms to form a bathtub for groundwater to divert under.
If it's buggy, include a S2S nano single as an inner tent. Glue it to the groundsheet and sew in a zip if you want total bug protection. Or buy a heavier premade inner tent from the previous companies or Aliexpress.
Get a trekking pole or two to pitch the tent. Medium/sturdy is better than very very light carbon for using your tent in high wind. You can make pole "connectors" with any tubing (PVC is cheap) to turn a single pole into an A-frame to give you more internal space in your pyramid.
My favourite tent pegs are a mixture of mini groundhogs for soft, easton nail types (I use DIY carbon ones) and a single vargo titanium nail for hammering pilot holes into hard ground.
