If you want top quality, breathabilty and truly waterproof and light weight look into Mountain Hardware or Northface...of course these do not come in camo but you can find natural colors in some of there lines. Be prepared to spend a min of $400 for a top and bottom combo.
There are some good "hunting" rain gear lines out there but I have yet to find one that is truly light weight, breathable and completely waterproof. I have owned cabelas and russell apx, both eventually will get you wet after prolong rain. The russell apx is cheap (for the quality you get) but the best thing I like about it is the flexibility you get and it is pretty breathable. I wore my russell twice this past turkey season, first time I sat for over 1 hour in a downpour, I got slightly wet around my knees. The other time we walk for a while in a downpour and I got wet around the knees again but I got wet quicker. I presume this is a flaw and/or con with the flexible knee designs.
Here is a question for you, are you actually planning to hunt in the rain? Or just getting back to camp or waiting it out? I do not plan to actually hunt in the rain, but in the backcountry when it rains you do not have a truck or house to shelter you so protection is a must.
Another tip that will make your trip more enjoyable; make sure you have good boots and gaiters to keep you dry. Plus as many pairs of socks as you can carry, happy feet equal happy trip. I did 12 days last summer in the Appalachian Mtns, it rained a few times and I got soaked. My boots eventually got wet, but the fresh socks made all the difference. FYI...no matter how water proof your boots and gaiters are they will eventually get wet if your walking in 6" of water and mud.