Some new packrafts and paddles will make it easier to cross rivers and lakes. These two (suitable for flat water/Grade 1 rapids) weigh less than a kilo: Alpacka ‘ghost’: https://alpackarafts.com/product/ghost/ @ 1.5 lb & $595 and Klymit LiteWater Dinghy: http://www.klymit.com/index.php/litewater-dinghy-lwd.html now 35 oz & $199. Note also this ultralight paddle: http://www.packrafting-store.de/Paddle/Special-paddle/Supai-Olo::472.html @ 365 grams!
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