Need some ideas for a water storage system

Ive got a lease place for cattle. The area is cross fenced into 3 different pastures. The water source is a big 3-4 acre pond. When it is full, it is accessible to all three areas. Now that the rain has quit, the water level is dropping. and only accessible to one of the pastures.

I want to set up a 12 volt submersible pump into the pond hooked to a deep cycle battery and a solar charger. I would like to have this feed into a 600 gallon tank i have on a trailer to be used for a reserve. This tank would feed a 150 gallon trough with a simple float valve.

What i need help with is I would like to have a couple of floats in the tank. One about 1/2 or 5/8 full to turn the pump on when it gets to that level, then another at the full mark to shut the pump back off.

Im pretty good at rigging things up to make them work, but i have never done anything like this and do not know what to buy.

This is a lease place, so setting up a permanent source is not really an option at the moment, trying to keep it cheap.

Not cheap but maybe you could DIY parts of it with a Square D switch as pictured

https://bestfloatvalve.com/products/electric-float-switch-kit-electric-float-valve

I suppose the rig above wouldn't work in a closed tank.

Maybe something like this?

https://tameson.com/measurement-control/level/switch/float/

Slide that inside another pipe driven into the bottom set the depth you want run the wire your almost done.

Couldn’t you go with like a jet pump, add a pressure tank to the pump side and leave it on, then just do a float valve in your 600 gal tank? Or are you preferring that the pump not kick on until it needs to fill a good bit of the tank? I can’t think of a way to set up some kind of float actuator that wouldn’t engage the pump until it’s halfway empty. I’m also not a plumber

Should be something here that will work,

https://www.fwmurphy.com/type/level-switches

Trying to keep it cheap and reliable for the most part does not work. Do it right the first time and save headaches and money.

Just rent a backhoe and dig a trench into each pen from back from good water.