Completed the 20 miler, parking was not an issue early on but a little expensive not sure if it got harder as our race set off an hour before the others.

The course was more  scenic than I expected and was basically 2 big laps of the lakes (about 8 miles for one lap) with a couple of miles to and from the start area. On the whole fairly flat with the exception of one very step short hill about 1k from the finish.

Marshals were supportive esp at drinks stations and it really helped that everyone's names was printed on the race numbers. 

Apart from the start and a few sporadic groups other crowd support was limited but i actually liked this as it helped with the mental prep needed for a marathon.

Downside for me were no gels/energy drinks at stations on course. And if it's your thing no goodie bag at end. Just a medal,banana and water. 

I would like to go back and do the half as it felt like the course had good on potential.