MO is pretty casual about when, where, and how residents shoot on their property. I travel a 4 county chunk of north-central MO and see lots of foolishness regarding where folks shoot. I've seen such things as a target board set up in the corner of a yard with nothing between it and the next house besides some scattered timber. Another was a guy who pushed up some loose dirt to make a backstop but rain had washed the pile down to about 1/2 the height of the target board and in the background was an MDC lake campground. A final brain fart idea was small bales of straw and plastic barrels used as target stands with an open field behind and several houses out of sight less than a mile away in direct line from shooting line to targets(I know for fact that they were shooting centerfire "deer" rifles while the ground was frozen so have good reason to believe there may have been ricochets toward those houses).
For temporary use with light caliber rifles or handguns, a decent backstop can be made from barrels filled with sand or simply a pile of railroad ties. I shoot 22 in my yard using an angled 1/2" steel plate to divert bullets into the dirt. Hundreds and hundreds of 22 bullets have impacted that angled plate w/o issue(well, there's no grass growing there anymore).