Pros:
Big Sioux is a great disc golf course. It has concrete tees and all of the baskets are in place. 18 holes with alternate pin positions. At par 57, it has some length.
The park is very pretty, and has camping on site. The land is flat for the most part, with plenty of trees on most holes. A bend in the Big Sioux River loops around the course, and is fairly close on a few holes.
I liked the variety of shots required. The fairways take on many shapes and sizes. Sometimes the basket is not visible, but often it is apparent where the fairway is leading. Aside from one or two narrow gaps, fairways usually provide a decent line, while still requiring shot shaping and staying under the canopy.
There are plenty of chances to score some birdies. The short and mid range holes are reachable, but the woods will usually be there to provide formidable resistance.
It is tough for me to pick a favorite hole that stands out above the rest. The first 15 are woodsy, and do a good job of hiding targets behind cover while still being accessible. Hole 4 has a hanging basket. The last 3 have fewer trees, but not entirely wide open.
Cons:
Got to pay the fee to enter the park. Worth it if you ask me.
There are some signs that are no longer at their posts. There are also some posts no longer at their posts.
Other park goers may wander through occasionally, there are bike paths winding around the area.
Other Thoughts:
This course has enough to be challenging without being super frustrating. I played it one time, and scored a 62 (+5). Made 3 birdies, but wiped them out with a bogey, two double bogeys, and a triple bogey.
Opened with a bogey on one, but warmed up nicely, and I was one under par after hole 12. Then the wheels fell off. I was not having a great putting day to begin with, and I went full lumberjack, taking on any tree in my way. Hole 14 cost me 3 strokes by itself.
I would love to return and play a few more times here. With some more reps, I am sure I could put together game plan and make enough shots to get under par.