Unless the paved portion is really nice, I think you should consider going for a decent set of small cruiser wheels on an otherwise ultralight setup. I build a lot of weird novelty cruisers, so this is what I would do if I was going on your journey:
Antihero mini Eagle 7.3
(Small/lightweight, easy to carry)
Tensor MagLight 5.0
(Lightweight, tall axle height)
OJ mini Super Juice 55mm
(Soft, small-ish for cruising)
Rush all-weather ceramic bearings
(Great price, lightweight, underrated)