While following link in unrelated thread, stumbled across this, which, depending on details and cost, might be worthy of consideration for water crossing. Curious to know the material (durability) used.

New project ... 24 oz raft and 2 oz paddles for high mountain lakes As you'll see, this describes a small raft (prototype photo shown).

This small company specializes in unique outdoor products designed and manufactured themselves. Maybe an e-mail query would yield more details.

Standard disclaimer: no affiliation of any kind nor, for that matter, have I ever purchased any product from them.