How should riders train in the weeks leading up to the event?
I believe one of the best things you can do is just get long hours on the bike. Make sure you fuel appropriately, aim for 1g of carbs per 1kg of bodyweight as a rough guide. It’s important to make sure you are getting your body used to taking on this amount of food so practice this with getting hours in on the bike.
What kind of riding experience is helpful before taking on Flanders?
Depending on what distance you are signed up for, it’s good to feel comfortable riding a distance close to the length of the sportive you are doing. I would say it’s worth also getting used to group rides as there's so many people taking part!
How important is climbing strength versus endurance for this event?
I believe endurance strength will help you get through this event better than climbing strength. Worse case you can always walk parts (which you may need to on some of the climbs based on all the traffic)
How do you stay fueled through the day? Do you wait for the ‘Feed station’ or take your own.
The food stations are incredible at this event. They will have waffles, sweets, sports nutrition, fizzy drinks, sweet and savoury so they are well worth visiting during the ride.