OK. Great. I'll take some extra caps to pass out. Thanks for the tip. 
And if you eat meat: don't chop it all up at one go: the staff will wonder where you hid the kid. Cut from the piece as you require it.
We were doing that in Florida at dinner one night, and a party of women stopped to gawk. This is not tongue-in-cheek (you seldom get that in the UK - tongue) and I can't remember if we did or did not get a round of applause.
Regarding your caps for the natives: best not offer them in Scotland. If in Glasgow, wear nothing blue or green. Don't let your wife wear a fur.
Drinks (spirits) come in tiny measures wrapped in huge prices.
Don't think something's amiss if you suddenly realise you can't understand people. Some accents are so impossible that only families can make out what's going down. "Hey, Jimmy" is not a term of endearment.
If you drive, don't tailgate; using a horn is a challenge. If at traffic lights in main city centres, make sure you don't get stuck in the patch of lines between them: you could get fined; make sure you can exit that no-man's land before you enter it.
Light sequences: Red, Red-Amber, Green. Then in the opposite way, it's Green, Amber, Red. (That game with the amber lets you know if the next change is going to be Stop or Go.)
I can't recall any equivalent to the American turn right at red lights; it would of course be turn left, in the UK, but I really don't remember ever coming across that system.
To get the best of Scotland you need a car, and to leave the two big cities behind. Perthshire is a rather nice area. We honeymooned at Loch Tay. (We were very young and very impecunious!)
Other than that, you should have a nice time as long as you don't try to feed the monster.
https://www.youtube.com/watch?v=6FYJydaClRAThe above is a link to Albert Watson's Part 1, shooting on the island of Skye. There's a Part 2 which is now unobtainable on my list of favs. Worth the hunt for it.
A nice break for you from politics - if you go!
Rob