@orange dream
it's probably too late to change anything about your trip, but you have way too much time in the car for the number of destinations, and you are staying 6 nights in 5 hotels
have you confirmed pressurized hot water in each of your hotels? a power shower = an electric water sprayer that might or might not be above room temperature
i need to know your ingress to glasgow (all airlines and filght numbers including connections)
the date and time of your skye tour
why is the tour starting/ending fort augustus?
the day, date and time of your balmoral tour
st. andrews and the royal mile in the same day? just because it's bright at midnight doesn't mean either of the castles stay open that late
your itinerary is beyond hyperaggressive and you are spending more time driving, checking in, and checking out of hotels, then you are "doing stuff" with the exception of the skye day
also, the number of "fast food" options on your route is measured in negative numbers
i need to know your egress from edinburgh to? EDI to ? GLA to ? airline, flight #, departure time
finally, and most importantly, your 3 kids are likely going to hate you because european cars are VERY SMALL INSIDE and unless you have specifically rented an "SUV" there is no fucking way you are going to be able to get 5 of you and luggage for 5 in to a single vehicle
sorry to be a downer, but all in all, i would grade your fiesta a D-