This works with one player
1. Dig a tunnel, about 200 blocks long?

2. get a llama or donkey with a chest, put your stuff in it
3. turn off freecam option cancel packets, & for 2b2t turn free cam speed down to about 0.5
   ride the mob
4. type .vanish dismount
5. toggle freecam, and walk forward, if the chunk you're walking on isn't loading wait for it to load (IMPORTANT)
6. walk until the end of the tunnel and wait 10seconds
7. type .vanish remount
8. toggle free cam off, and go to your starting point, you will see another entity, take the stuff out of the current one you are riding then ride the other one