Well you need a to have a top secret hidden base to hide your goods so either make your own off other people's or look at 4 from mine there simple and easy!
Step 1: Hidden Tree Base
Then make a big enough that there's a 1x1 hole in there then make a ladder up the wood through the hole and make a ladder about 10 blocks down.
Then store your goods in there then go up the ladder then voila a hidden tree base!
Step 2: Hidden House Base
Starting off make a staircase down 5 blocks then carve into the stone that's there then make a ladder down now after the ladder went down 5 blocks make a 20 block drop make sure there's water at the bottom! (In survival if there wasn't no water you would get hurt!) then make your base do it when the water flow stops so you have to dig in a bit for it to stop! Then make the base store your goods and voila a secret house base (re her when you get up cover your back with that 2 blocked carved in place with wooden logs!)
Step 3: Hidden Door Base
Large chest and wood so start off with a tiny house looking thing dig in a bit then make a hole about 20 blocks deep.(if you run into a cave its not my fault) then cover up a wall then place any panting which will cover the hole thing then go in the door start making the ladders down dig relay far with 2 paths one with the base one with the dead end make the base on the left the dead end on the right (lots of times I found the base on the right) then start making gold floor then make diamond walls on the R&L Of your base then at the end add iron blocks. Then add the crafting bench large chest stonecutter and furnace is hen voila a hidden door base!