Floor question

I have looked but do not see anything in past threads concerning this.
I have a house built in 1922. It sets on top of stone piers about 12" off the ground. They put no vapor barrier or insulation in it.

After the rain we have had this may my floor is wet. I am waiting on some money to come in and when i do get it i want to do the flooring.

How do i put in a vapor barrier. I assume i am going to have to rip up the osb in the floor(lame attempt from previous owner to refloor it 7 years ago), and go from there.

I can't get underneath the house. that is impossible. So what would you recommend. I Need to insulate the floor. its very cold in wintertime. I also need to figure a way to stop this moisture from coming through. I plan on laying down some osb and then laminate flooring but intend on trying to insulate the floor with bats and doing so by using the wires that you can push between the joists to hold the insulation in and just laying insulation on top of the wires and then putting the osb down.

thanks

Thanks