Just curious as I have a similar challenge that you do. I am building a trail through an area that has the designation of 'muck' for soil type. I cut a trail through in late August as that was the driest time however when I tried to get a dozer in, he made a mess for the first 100ft and I told him to back off. I am planning the corduroy road with stones from the walls on my property. Prior to doing so though I was wondering whether I should be removing the peat. Are you removing any of the peat or are you planning to lay your wood slabs right on top? I thought that was a pretty good idea the slabs and would be interested to know how you do as I have a local mill that produces these from pine that people around here use for firewood/kindling.
I will not be going back there to do work until Aug-Sept and I hope this Fall is a dry one that way I can get it all done.
I'm not removing peat -- I was advised that this would be a humoungous job, assuming the peat can easily be 5 to 10 feet deep. And, just as importantly proper fill would need to be put in its place and the water would need to be dealt with.
I think you need to be careful of using stones. The idea is to make a floating path or sorts -- one that will distribute the weight of itself and it's cargo across a large enough area so as not to sink. Rocks won't do that. If you want to use rocks, you'll need geofabric, which was discussed earlier in this thread.
I'll post progress reports, and hopefully pictures, to keep everyone appraised.