To anyone still reading Buy them or make your own if you don't have experience with them before traveling.
They use them in SA and willm expect you to use them
It's Your Choice.
I make my own. Twenty minutes or less.
No experience really needed they are fairly simple to make.
Get 3 sticks roughly the same diameter and length or dowel rods 5/8 to 3/4 inch in diameter from your local lumber yard, Lowe's, etc. Use a binding long enough that allows about 1 to 1 1/2 inches wide wrap: para chord, bungy chord, zip ties, etc, Place the 3 pieces of wood together to form a triangle. I recommend start out at about or just above shoulder level and wrap the 3 pieces snuggly together. (Snuggly as you will have to adjust the binding to your height/comfort)
Next spreading the legs equally apart, about 20 to 30 inches.
Placing your rifle in the fork of your tripod adjust your binding up or down to get the right height and spread the legs in or out for stability.
Once you have the correct and comfortable height for you, place a mark above and below the binding to ensure you don't alter the binding's location as you (not overly) tighten the binding and as a reference for when you have to tighten the binding as it will eventually loosen from use.
Options:
To help protect your rifle from any dings get a piece of foam pipe insulation or cut a piece of scrape rubber hose you might have and place a piece around each of the top prongs.
Depending on how long the top prongs are: You might find it more accommodating to cut one or all 3 of the top prongs about 3 - 6 inches above the binding or perhaps one prong flush with the binding and securely cover with a very thick (old T shirt) piece of cloth or any other soft material for padding to help protect against dings on your rifle. Especially if your rifle has a free floating barrel.
Note:
Never place a free floating barrel directly on the sticks it affects your rifle's accuracy. (Always place the forestock of free floating barrel on the sticks)
You also might find it beneficial to cut a sort of dull point on the ground end of the legs to help stabilize the legs.
OR
You could do as others have mentioned spend as much as you want on any one of the number and types of factory product shooting sticks.