The two men appear to be brothers.
The guy in the roof is wearing a sweater, the one standing seems to have some sort of canvas jacket.
They still have the muzzleloading rifle, but also have a cartridge shotgun.
Pistol looks too small for the holster.
Holster has a flap which is tucked into the strange belt. (Just figured the belt out. It is too small, and has an extension with another buckle.)
Belt had cartridge loops, but I think they are for the shotgun, not pistol.
Big black hairy dog behind the woman. (If I was homesteading in lonely, possibly hostile country, I would certainly have a dog!)
Soddie appears to be of fairly recent construction, lots of grass still sticking out between layers, but it is already drooping and headed for collapse. Poor job, because they don't know better, or a rush job, because the either expect to upgrade soon or move on?
Straw hat on the ground belongs to the woman, too big for any of the children. (Oops, had picture zoomed up too big. Two straw hats, one for the mother and one for the little girl.)
Older boy has bib-front shirt. (Which is soon to become too small to fit him.)
I'll bet Nebraska doesn't have any elk with antlers like that any more!
Amusing that they got shoes on the little girl, but her brothers are both barefoot. Usually the other way around, guys want their shoes to tramp through the woods, but women like to run around the house barefoot.
Can't figure out what the wheel in the foreground is. Looks substantial, not a toy, but it's just dropped there in the yard. If they had any heavy-duty farming equipment, you'd think they would've got it in the picture. The prominent firearms make me think they are earning their living by hunting, however.
Grizzle Bear