The Fence Wade is a very adaptable technique that really takes advantage of river features and eddies that are formed by waders.  Picture getting 6 people quickly across a shallow fast stream.  The first person ventures a couple feet from the shoreline and grabs a stable position.  The next uses the eddy behind him and plants himself fairly close by next to him (we now have two eddies).  Keep up this process with the remaining 4 persons and we have a nice long fence.  Now the first person can go behind the other 5 and set-up next to the sixth person.  A group of paddlers can quickly leap frog across swiftwater in this manner.  If there are natural eddies along the way, they become an extra person - no value in placing a fence post there.  When traversing the fence, you can use the others as a hand rail for extra stability.

What is your objective?  How many people do you need to move?  Are there safer alternatives?  Wading with a paddle is slow business.  On the other hand, if you don't have too far to go it is relatively safe and efficient.  Partner and circle ferries do a great job in protecting a victim.  They are also much faster than wading alone.  Line ferries are surprising efficient but require dexterity on the part of the victim as they are not as well protected and have to be an active partner.  For moving a large party short to moderate distances, the wedge is an excellent technique.

We often combine wading skills with other lessons like foot entrapments, unpinning boats, pins, line crossings, etc.  As an instructor, you will need to evaluate when to use wading versus your other options.

In a number of rescue scenarios, it may be necessary to get a person at the accident location.  This is especially true in many pin situations.  Wading is often combined with swimming and perhaps using your boat to reach the victim.  Wading is especially useful in shallow water, water below knee depth.  Wading has its own unique challenges.  If you have ever tried walking on wet rocks (especially muddy rocks), you will notice they can be quite slippery.  Moving current compounds the challenge in staying upright.  Most wading techniques add one or more "legs" to form a more stable posture.

One danger we always need to keep in mind is the possibility of foot entrapment. Take your time when wading.  Sometimes it may be difficult to look under the water surface.  While placing weight on your brace, feel the surface bottom with your toes for nice stable positions.  Once both feet are firmly planted, you can then move the brace.  Always be prepared to swim either on purpose or by accident.  Swimming is actually faster and safer as the water gets deeper.  Avoid standing in fast current where possible, this is known as the "Safe Eddy Rule".  A safer approach is to mix short swims in the fast water with rest stops in the slack water of an eddy.  Here is a good article on wading technique from a fire & rescue journal: Wading Technique Article.

Here is a sample of wading techniques: