If you happen to suffer a cut, you will bleed more because of
Warfarin, but most minor cuts are not a problem. The same, to a lesser degree, can be said about
aspirin.
As you seem to have only periods of risk for a clot, and even during those times a person suffering from AFib/Flutter is only at a slight risk of "throwing" a clot, I'd not be too concerned about spending a period of time off of Warfarin, but would, take a full does aspirin, not a "baby" or reduced dose.