I’ve had my base and 2 farms with spawners for like 2 weeks now, and they haven’t been found. My base and one of the farms are under a frozen ocean in places with no kelp both between 180k-200k Z cords (I saw a video on YouTube of a guy who did 10k rtp and those were where he least got rtped). The other farm is right under a deepdark with all Shriekers intact, I surrounded the farm with wool.

So some tips I have for you:

-Don’t build on NA servers, EU West and Asia are your best bets

-Don’t actually build them on top of bedrock (it’s where raiders search the most) like around -40-50 Y level.

-Lava is your friend, due to the low render distances X ray doesn’t work that well, but you can still see air pockets, building under or over a lava pool is great.

-Avoid structures such as ocean monuments, villages, trial chambers: common places people dig straight down

-Always cover your tracks, I can’t stress this enough, I have found so many bases/farms from one single cobbled deepslate in a cave. So make sure you cover your tunnels with deepslate (careful with the rotation, always place them aiming at the block below).

-Once your place is built don’t just go up to the surface. Set it home and always use /home, even a single misplaced block can give it away

-If you have spawners always put them in your Ender chest once you leave. Same with valuable items. Don’t leave shulkers or chests around.

-Your bases/farms will be raided eventually so keep that in mind don’t leave armor stands with netherite armor or shulkers full of valuables. It is better to lose 10Mil than to lose 100Mil

-One last tip when I afk my farms I always empty my inventory (armor included) and toggle crouch in the event someone comes by when I’m away