Scotland NC500: How many days do you truly need to enjoy it?

For anyone who has driven the NC500 - how many days did you take to do it and what was your experience?

I have heritage from Scotland and I’ve never been, this is a once in a lifetime exoperience and I will already be visiting Edinbugh, Glasgow, Lochness and the Isle of Sky. I want to rent a winnebego to travel the NC500 to top it off but want tmake sure I really have the time to enjoy it and go at a slow place.

Please let me know how you found it.