I have been ramped twice. Both times they asked to see current pilot certificates and medical. During one ramp check they asked to see ALL the aircraft documents incuding airworthiness, registration and aircraft manuals. To answer your question, I would suspect that the official aircraft W&B with all installed euipment dated and signed by a A&P would suffice, but I suppose the FAA could ask for anything pertaining to:
Sec. 91.103
Preflight action.
Each pilot in command shall, before beginning a flight, become familiar with all available information concerning that flight. This information must include--
(a) For a flight under IFR or a flight not in the vicinity of an airport, weather reports and forecasts, fuel requirements, alternatives available if the planned flight cannot be completed, and any known traffic delays of which the pilot in command has been advised by ATC;
(b) For any flight, runway lengths at airports of intended use, and the following takeoff and landing distance information:
(1) For civil aircraft for which an approved Airplane or Rotorcraft Flight Manual containing takeoff and landing distance data is required, the takeoff and landing distance data contained therein; and
(2) For civil aircraft other than those specified in paragraph (b)(1) of this section, other reliable information appropriate to the aircraft, relating to aircraft performance under expected values of airport elevation and runway slope, aircraft gross weight, and wind and temperature