The septic tank war never ends - full leach field

I really appreciate y'all helping out here, I think we're on our third thread.

So three weeks ago we pumped it out and it worked great until it didn't. From what I can tell some effluence, solids, grease, etc.. went into the leach field, plugged it up, and its overflowing again.

Problem is we're on a large hillside in rural area, so we need 100+' hose and a few hours to pump uphill. Cost $450. I also don't have much of a leech field as we hardly have any flat land (think half a tennis court) on this hillside.

I'm going to try


Is this a good or bad idea? Am I delaying the inevetable repipe of a leach field?

For background, we are up north by the great lakes and this place is used 6 months a year. It is not winterized, it is old (wwii era), and the tank is primitive and small.