Very cool!
I'll echo Jesse in about everything (OK, I didn't so notice that gray area he mentioned!).
The main vehicle looks super nice and I think you have done a fine job with the coloration.
Of the things which caught me: those logs... take a look at any tree trunk and get to work on those! They are prominent, and you can easily make them pop - logs have wood ends that really differ from the bark, bark is FLAT flat flat - bark has color variation.
EVERYTHING - logs, tent-rolls, tarps, etc. has to be tied or strapped onto the vehicle. Jesse mentioned the tapes and straps - also rope - folks tie stuff on with rope. Easy to do (OK, a little tedious, but really worth the look, IMO!) with thread. (Hint: soak thread in diluted white glue or acryl paint of your choice before putting it on wet - this way you'll get no tiny hairs and fibers sticking out!)
The tracks do look a link or 2 loose... I don't have much experience with these DS tracks, but if you can cut a link out, it will help snug up, I think.
You can make all of your tarps and rolls pop a bit if you wash them with some dark umber or other darker wash tint. The biggest issue is that when you look at the ends, you don't get a feel for deep folds and shadows... get that darkest tint down into those folds! A dark wash on the tent rolls will also cut down the rather bright / light green I see in the photos - I think most of that stuff would be darker and browner, but...
Making sure that the tarps and logs and wood boxes are FLAT will make them contrast in finish and pop around the vehicle. A slightly-satin finish on the vehicle itself may be correct, as these paints were enamels and not always very flat, but that's my opine.
Again, quite cool! I'll also echo "rarely see one of these done" - though that could change with there now being a couple of new DML kits around!
Cheers!
Bob