i used to carry a laptop when traveling, but after i had one stolen in san diego from my hotel room, along with a kindle, i stopped, and i realized i was hauling around a bunch of extra weight, with additional security issues, and in reality getting so little processing done that it just wasn't practical, and a bunch of large capacity ( think 128 gb cards), is so much less than the cost of a laptop, some of the 128 gb cards are as low as
sandisk_sdsdxxy_128g_ancin_extremepro_sdxc_128gb_card.html $39 that having a card for each day is doable, i come to pixelmania with as many as 10 of these, in one card case, one for each day, total weight is so much less than a laptop, and such a small space need in a camera bag, and the spares stay in the room while i am out and about
i would put as much into an iMac as i can afford, get some spare cards, one ruggard sd card case, carries 12 cards, and all set, the link above are modest speed cards, which is all you need unless you are shooting a sony A9 at 20 frames a second, then you need fast cards, i have 5 of those at 300mb/sec for rail charters, but those cost considerably more,