Hazelwood Sports Complex is much large than 1st appears. This should bring you to a good view of the South East Side of the park.
This area can be a Muggle challenge area please be stealthy and return cache where it is not easily visible.
Permission granted by Hazelwood Parks
Note at the time of the placing I had no trouble with flood waters although with heavy rain it can be a bit Soupy so recommend boots although I was able to place in water-resistant tennis shoes with no issue.
Also, the Parking area provided was accessible even with flooding on a nearby road but an alternate route may be required.