Wow Darley,
This thread is a blast from the past.
Can you find a local landscaper to help you with the grading? Do you have free range to do whatever you want (and can afford) there, or do you need approval from the owner and/or permits?
It kind of depends on your budget and how much work you want to put into it, but it seems to me like your choices are to either divert the water somewhere else, add French drains, raise the grade, or construct a raised walkway or even a pontoon bridge :B to get to and from your truck, or some combination of those.
How long does it take to soak in after a rain like that? I assume it takes a few days or a week? And how often do you get that kind of rain?
A professional landscaper with good experience in grading and drainage is a must though. You need to be careful changing the grade so you don't starve those beautiful trees.
Where's your camp? Is this in ND? My wife and I took a big trip last fall and spent a few nights at a gorgeous little County campground called Buffalo Gap Campground, just to the west of Theodore Roosevelt National Park. We agreed that it was our second favorite camp of the trip. It was also the least expensive. That sure is beautiful country up there. I wish we could have spent more time exploring the area, but we had to head home by then. Out of nineteen states and nearly 11,000 miles on that trip, it was our #2 favorite spot.
Anyway, my wife has run major landscaping companies here in Southern California for decades (the kind of companies that landscape Disneyland and Universal Studios) and a lot of her expertise has rubbed off on me. You definitely want to consult with a decent landscaper to get some drainage advice that works in your area. It probably won't even be that big of a job, but it will go a whole lot smoother if you get quality guidance.
