The simple answer is every Mid is given what they need at the right time. When Plebes report they start off day 1 with boxes and the large white bag you see in the photos in this thread. That is white works (which is the main uniform for Plebe Summer), sneakers, PT gear, socks, underwear, t shirts, watch belts, canteens, etc. When they get their rooms there are boxes of books, cleaning supplies, personal hygiene. Each Mid is issued an inoperable M-1 for drill. Mids would be issued "field gear" such as a ruck sack, body armor, etc. when specific training calls for it. They are not issued it at the start of the year or Plebe year to keep. For specific summer training it would be issued and then returned. Certain summer training like sailing requires storm gear and other items... they would also all be provided to Mids.
As Mids progress through Plebe Summer they will be fitted and issued all the other uniforms that are needed from leather shoes to covers, formal uniforms to working uniforms, winter jackets to working jackets, belts, gloves and everything you can possibly wear throughout your 4 years. At the end of Plebe Summer (in non-COVID times) they are issued a laptop, monitor, etc at the end of Plebe Summer which they will use for 4. Mids are issued backpacks also. Camelbacks I do not believe are issued, but could be later on for summer training. Just to note, Mids technically pay for all these items throughout their 4 years. It comes out of their pay.