well, the radials don’t have to be long—maybe 3.5 to 5m—about 4 elements to a connetor should do you from 80m one down (or up)
You can take those elements and put them in some pvc and bury that pvc with the ends of the elements popping up to the plate. Make that plate removable.
I slip it all over a pvc post out of the ground—sounds like you might too because of dogs. Just unloosen the coax attachement connector from the plate and lift it all up leaving the radials etc on/in the ground....easy peasy!
I use DX Commander style radials for my WRC and works just beautifully. I watch the meter as I add the radials to the post there and the SWR just keeps dropping.