You'll see guys crossing with all kinds of rafts small and mid sized. I even followed a group of Airforce guys as they dragged a 16' aluminum canoe over the tundra to cross the sag. The smaller rafts with low capacities are fine but expect to have to make multiple ferries to get gear and meat back across. Guys that get in to trouble overload their rafts and flip trying to cross. It can be sketchy if river flow rises. The PR49 is a bit heavier compared to other packrafts because it's designed around a paddler his gear and a pile of meat. It's more boat because you need as much as you can get crammed into the smallest package.
Intex is a little low-pro IMO and you might catch a side wave and flip it loaded with meat. I'd go with koko or alpacka over that option.