Some sort of rear guards can help. Close full guards are liable to get clogged depending on your local gravel type. Fedor bendor type works, as does SKS seat post mounted whale tale.
I would like something at the front the cut down on the amount of shit I eat but not always a go.
What's the consesus for guards on grav bikes?
Patch it and just deal with geting muddy as I would if I were mtbing?
Tempted by a mudhugger type thing for the back end, would keep my arse and dropper cleaner if nowt else.