Maybe it depends on the country?
In regards to MEL, dont you need to carry a library of operational documents in the cockpit? I have never operated without a complete copy of the MEL? You must have a company policy in this?
If you seat pack the cargo then comply with the seat pack limitations. Ones I have used include not seat packing exit rows, there was something about pax being located behind seat packed rows ( maybe ). Maximum weight per seat pack etc. Again there must be a company policy on use of seat packs?