Hey SS, thx for the inputs i know its not perfect but still i hv added as much as i cud so keep pouring what all u can think ,
Keepin extra fuses & bulbs is fine, but the likelyhood ofa battery breakdown is less coz u must have examined ur battery before the journey, also on such long runs the battery gets sufficiently charged (unless ur driving in night most of the time).
& the probabilty of breakdown is present for almost all the parts, i hv just mentined the bare minimum which people tend to skip
In one of our journeys our car halted after a fuel filling session, the reason: since we filled the petrol till brim, a vaccume was created & the fuel pump was unable to suck fuel. Got it cleared using a footpump