The line astern wading technique basically lines up 3-4 people in a straight line facing upstream. It is a variation of the two person wading technique. After the victim is retrieved, please them in the middle of the line.

Wedge or pyramid wading can be useful for transporting a large number of people across swift moving water. The top of the pyramid faces upstream and uses a paddle for support. Everyone else forms up behind them making a large triangle. The downstream side of the triangle becomes a sizable triangle. Take care to face the point of the triangle directly into the current and expose the sides of the triangle as little as possible. Here is a video demonstrating this technique: Wedge Wading Technique.

You work with the hand you are dealt. Sometimes you don't have enough people to use the more effective circle wading technique. The two person wading technique places the more stout person upstream with their back to the current and the smaller person downstream facing each other. Each person holds on to the other's shoulder straps. The upstream person breaks the water and forms an eddy for the downstream person. Each person supports the other, if one person slips - the other can help them regain their balance.