Walking the 4 days Two Weeks before the event

I did post this question in the megathread but didn't receive a response, so please forgive the double posting.

I am doing the 4 days twice in July. Once, during the event and once next week with my wife who did not get a place. We are raising a considerable amount of money for charity and I want her to feel as though she has fully taken part.

My question is, are the 4 routes accessible throughout the year? I have converted the KMLs from the website into GPX files and have been assessing them for access.

Obviously, there are road closures during the event so I am concerned that some parts might not have safe pedestrian access. Also I have noticed the pontoon bridge issue on day 4 crossing the Maas, but i believe I will be able to divert at Spoorbrug Katwijk-Mook.

If anyone has any information as I create my plans it would be much appreciated.