I went a different path. Instead of drawers, I used 12”x12”x12” boxes from Shopko or other department stores that I can pull out and carry around. I divided the area under the bed into a front half and a back half. The back half is my “basement” where I store jacks, tools, etc., and my 3 boxes with smaller items. The two narrow shelves above the boxes are for my small tent and van’s awning.
I divided the front half under the bed into two layers for my wife’s supplies & clothing.
For her I got 12”x12”x6” and 12”x6”x6” cloth boxes from Shopko to store things in. This photo shows one layer and she has another layer of just as many boxes. They slide in and slide out easily. For her the biggest problem was remembering what she put in each box, so I made her a spreadsheet printout that she could consult.