What he said. Scotland: wildcamping central. Reduced items in eve from shops, ferry footpassenger - btw top decks great for whale or baskers etc spotting - hire a bike on islands or use buses - (very good from Stornoway, I found). Sorted.
I can confirm that taking a car, partner and two children AND staying in B+Bs is a VERY expensive way of doing the islands. on the other hand if it's that way or not going then it is still worth it! :)