Sandbags in pickup bed, placement?

I did not read everything but this is how I made a 2wd truck get me to work everyday.
94 dakota sport standard cab, swb, 6, 5-speed, 3.55 sure-grip.
Bought a stock standard extra spare tire from the junk yard.
Put rough tread snow tires with studs on both rims.
When winter came close, I took the summer treads off, put them in the bed up by the cab, (extra weight and easy access to the spare). Put the studed tires on.
Between the fender wells ran a row of cinder blocks.
Put a load bar at the end of the blocks so they would not slide around.
On each corner by the wheel wells I had a set of chains for the tires, that my dad gave me.
I never had to use the chains but they were there if needed.
Also there was a soft bed cover over the bed so if you needed anything out of the bed it was still dry.
I never had that truck stuck in the snow.