The island hole was the area for the first Wide Open that you are referencing. Cooper do you mean to the east of #3? I am confused by the west information.
I always thought that a longer to the south towards the treeline on #3 would be a much tougher par 4 shot there, it is a walk though to get to #4. I think that initially one of the ideas that was discussed by Dirk and I out there on that was to get it over there and then cross the road, but we were heading south in that layout not north. At any rate, taking that hole (on the hill) and moving it about 200' almost due south would create some tough shots, must hit the gap to get a good clean shot for a possible 3, or figure out an low anny (RHBH) or rolloer to get it to go there....the walk would be a little long, but then you could go accordingly and people would be visible walking as to not impede.
One thing that really bothers me on this is the notion that we need to go long though. This is the BUSIEST park in the metro area, and if you make the course so long that people get frustrated, you may alienate them from playing. You can indicate that there are plenty of other courses, but the fact remains, this is #1 in foot traffic in the area, so you shouldn't really be catering to the "pro level" disc golfer, but rather should be enticing people to want to play a fun, yet challenging course, that then would encourage them to go out and explore the other locations in town.
Be mindful. This may not be the "first course" in town, but it is by far now one of the most viewed courses in town, and that attraction is more important than having a par 64 course for the sport.
However, exploring ideas on temp holes for tourney play as such is also a great idea. One of the best things about KC golf is our ability to alter a course for level that is needed. I would encourage you to use a portable basket at leagues that you run, if you need to borrow a basket, let me know, I can hook you up with one as well.