I used this woven polypro bag first (that they no longer sell). It's like a heavy duty feed bag material.
And stuffed it tight with plastic bags (feed bags and wood pellet bags mostly but also Walmart, etc)
To get it tight, I compacted them into garbage bags first (sit on bag to remove air then twist shut) and then stacked those inside the debris bag and stuffed loose bags in between.
This lasted 5 years until the Sun's UV made the polypropylene fail.
I took the whole target (falling apart) and stuck it inside this much larger similar bag
and zipped tied the top shut. It's a bit loose but still works great (just don't shoot extreme edges where loose).
That should last another 5 years.
I chose not to use rags, etc because plastic inside is more hygienic, longer lasting (think less mildew and bugs, etc inside).
It was hard enough to fill an 89 gallon one tight. I wouldn't attempt the 200 gallon unless you folded it down to make it smaller. I haven't looked but similar ones that aren't over 100 gallons are probably available somewhere.
On the first one, I used 2 bags (filled first one, then capped it with the second turned upside down and then sewed them together with zip ties). This was a bad idea (the two bags stretch then snap back to trap your field point/insert inside). If I had to do it over, I would've capped the first one with a piece of doubled over tarp and then sewed to the bag with an awl and zip ties. The old bag inside the new bag doesn't do that now because the old double layered target is so dry rotted that it can't grab the points now. But when new it was really bad (like 100 to 200 lbs of force to remove an arrow bad).
You can rotate and shoot all 6 sides.