Decoupling capacitors - placement close to DC output
The smaller cap closest to output should help with radiated noise. Larger caps deal with lower frequencies (and tend have more self-inductance) so can tolerate more trace inductance so can be farther away.
Electrolytic vs ceramic capacitor is moot in the face of what I just outlined since type implies capacitance and self-inductance. Your electrolytics are always larger and slower than your ceramics.
It follows all the same principles of capacitors on inputs to ICs.