Loaded turfs would probably be a good all around tire for you, that's what I use.
Still gotta wait for a little 'drying time' before mowing though.
I put chains on my loaded turf tires for winter use..........works extremely well on my steep paved driveway in icy conditions.
EDIT: If I was to drain the R4's............I would catch the rimguard as best I could, and transfer to the turfs.
Wear disposable clothing, cause rimguard is rank. Start with valve at top, tractor jacked up and release the air...........then spin tire valve to bottom and drain as much as possible. Then remove tire from the rim(catching all rimguard).........wash and dry tire and rim completely, and reassemble