Avid waterfowler here. Been all over: fields, water, pot holes, boats, early season, mid season, late season, hunting in 90+ degree days and -20s. I live and breathe waterfowl. I'm ashamed to say my phone has more pics of dead animals than my kids!

I currently wear nothing but Sitka for waterfowl......BUT I really don't see a need for it.
Before I became a "camo snob," I had a mix-mash of camo, waders and such. I'd by Cabelas brand bibs, Under Armor baselayers (before I discovered merino), Roger's 1/4 Zip and a Drake wading 1/2 fleece-1/2 waterproof jacket, an Old Gander Mountain TechH2O jacket and neoprene waders......and it worked! I still have them for "backup" clothes, or if a buddy forgets an item. Last season my gear was in my brothers truck and I had to use my old camo and performed flawlessly.
My cabelas bibs and Drake jacket are warm and waterproof and I'd easily hunt with them in a heart beat.
I hunt in a club and have seen every camo from head to toe Sitka (like me) to Drake, to Roger's camo, to Hard Core, Real Tree Hardwoods. Hell, we even had a guy in the blind with an old reversible camo/blaze orange vest with blaze orange stick out on on the side. One other guy hunted in a Red Alabama hat in the blind. Or another we had a 3rd guy show up with blaze orange gloves for deer hunting!
I guess bottom line, as long as your not moving, use normal camo and not an idiot (like the three guys I mentioned above) you'll be ok.
I do prefer the Sitka pattern or Max-4 (or whatever thr new Max camo is.) Drake is really good too. There's a lot of options. I will also second the opinion that neoprene sucks. Breathable is def the way to go. But still moisture gets in just from your own sweat. Buy a boot dryer for day-by-day use.
The biggest thing is staying dry. Merino wool and baselayers that pull moisture away from you are awesome. Layer your clothes and you'll be fine. You don't need $1,000s for camo.
Lots of inexpensive base layers, mid layers can get you buy. But I would recommend good waterproof outter layers beacuse being wet, clamy and cold is miserable--and that's usually when waterfowl hunting takes place.
If it were me and I was just starting out, didnt want to break the bank, heres exactly what I would do:
•Buy Black Ovis merino wool top & bottom baselayers from CamoFire.com
•Buy a Max-4 Hoodie from Roger's (Or Sitka Dakota Hoodie/Drake Midweight Wading Fleece)
•Buy Roger's long sleeve camo shirt
•Buy Banded Breathable Uninsulated Waders
•Cabelas Waterproof Bibs
•Farm & Fleet brown Beanie (Or Sitka Dakota Beanie)
•CostCo Merino Socks
•Waterproof, leather boots for early, mid and late season (I just use my deer hunting boots and they double as field boots)
•Jogging/fleece athletic pants for insulation over bibs/under waders
•Waterproof Shell Jacket (Uninsulated)