It sounds like you dont have a problem with drought or low
water table or not
enough rainfall in the growing season, you are doing pretty good.
You could do swales if you have some plants or want to encourage some extra soil life/animal that prefers a slightly drier area that is not the depression of the
swale.
A swale could also help you filter the runoff before it hits the creek, top soil, leaf litter, animal manure, fertilizers, worms, idk.
Swales could also help with your flood water management.
Iterations are fine, we don't have to be perfect
My 2nd Location:Florida HardinessZone:10 AHS:10 GDD:8500 Rainfall:2in/mth winter, 8in/mth summer, Soil:Sand pH8 Flat