Thanks for all the suggestions. I went with the sealine version that Campmor Sells. If it doesnt work I will go back to the ziplock inside the sealine, least until its time for another one.

I will let you know how they worked when we get back from our trip.

we leave in just over 2 weeks 

I laminate my maps as well. If I was able to make trips of great distance it might not work too well, resulting in too many sheets to carry, however not my problem. One 'trick' that I do, is to use two maps that I cut up and overlap or duplicate the section where you would go on to the next sheet.
Best Wishes, Rob

I like to have my maps laminated, then it doesn't matter.  Our church children's program had a great laminating machine and they used to laminate them for me. 

I then still use a map case for ease of use and storage, but I don't ever have to worry about my maps gettng wet.

I'm surprised to hear that about the SeaLine.  Their stuff is usually good stuff.

I use zip-locks and waterproof paper.  I've seen people laminate maps.

Someone gave me a cheap one as a present, it quickly became all milky and useless before I ever tried it.

There is a whole other approach you can take.  If you have a route planned in advance, make a copy of various sections of the map along the route using plain paper.  It can be one map per day or mutliple maps per day.  Get a cheap zip-lock waterproof case and each morning put the day's map(s) in that case.  At the end of the day, put them in the campfire.  All you other day's maps and your "real" map stay dry and protected in your waterproof pack.

I have a GG case with a ziploc tip closure. I really like it but it isn't very durable. The first one I bought only lasted about 3 seasons but I liked it enough that a replaced it with the same thing anyway. The first one basically dry roted and got a few cracks. The one I have now doesn't seem to be doing that at all, so far (this will be its third year) Just bad batch on the first one? Otherwise I really like it.
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I guess they don't make my map case anymore.  It's a Sealine case with a very stout zip-loc style closure, yellow fabric running down the sides, with d rings.  It's been on at least 20 trips (all 6 nights or more).  Great experience with it.  If you can find one, let me know and I'll buy another.

Hey Saltedleech - before you buy, check out The Boundary Waters Journal Trading Post. I've had his map case for 6 years. I believe it is a  beafed up version of the GG one. It works perfect for me. It is not real big, about the size you are looking for.  You can only view 1 side but it keeps water out well and it is tough. I had the plastic clasp (like the clasp on most packs )snapped around my thwart and It was strong enough to hold my eagle fish finder on when a floppy northern got caught in the transducer cable . I spray the cordura back side each year w/ a heavy coat of camp dry. I think it is around $25. Good luck!

I use a double zip-loc. Not perfect but hey, it works. The white logo and label areas come off easily with denatured alcohol. Any alcohol would probably work as well I suppose.

I use the Chrismar for traveling and that's waterproof anyway. The printed topo details I take are sprayed with crystal clear. That's not perfect either but they are just for marking up. That's mostly busy work. Even I can remember where things are 'till I get home and an done unpacking.

I run a granite gear case also, it seems to be of a similar design to the piece that is mentioned above. It is also true that I refold multiple times during the day and run the "lake finder" maps in ziplock style bags inside the case. I also add notations in sharpie to the Fisher and Voyager maps as it strikes me. I believe the GG case is somewhere around 15-18 years old, no construction issue except i did replace 1 of the cam style buckles in the last couple of years went 1 of the rention tabs on the plastic buckle finally gave out. It has 100's of days in trips on it , most likely 1000's. Not sure if they are still the same but I would do it again. It's hard to loss something purple I might add, and the price was right to boot. Oh if that map case could talk!