The blind should be placed so the predominat winds you normaly get are there to help you and not hurt you.
I prefer to have the wind mainly from behind me or off one sholder or the other rather than wind in my face.
Being you have access you could make two spots to help you with this.
We just drive 4x4 treated posts to give us footing for a 4x6 treated platform and use those green plastic garden chairs. Then we use the natural surrounding vegatation for cover. Nothing really extravagent. The cattails you do cut can be bundled with binder twine to which can be used to help conceal the blind as that is what we do. Just tie the bundles to the rail we have installed all around the blind.
I would look for the deepest part of that slough though as that will be the easiest and best spot to remove some cattails. And it will stay open longer from ice.
If it is really boggy/mucky we dropped in 2x12 planking over the worst part so we could easily walk to our blinds. Again we used land scape treated timbers driven into the muck with a 2x4 support on each side and attached our planking to that. Our walkway is over 20 yrs old and other than an occasional new teflon screw or two we have done nothing.
And try to get out there early to see if any local ducks are suing it now. That will help you determine a place to start.
Shoot now I am excited and better take the drive to go check on my blinds.
JW