LOL...your going to get all kinds of answers from a RV website that few if any has never made a living pulling GN trailers and crossing DOT scales multi state.
NOTE
" Unless your F250 truck and trailer is registered commercially dot doesn't want you on the scales or even taking up space in the entrance line."
If your registered commercially your trucks 9600 GVWR and the trailers 17000 GVWR = 26660 lbs for your declared GCW operating max. Now if your state allows you to register your F250 at 10950 (sum of the axle ratings) then you can declare a 27950 GCW as your max operating range You can't exceed the trucks drive or steer axle/tire rating or the trailers axle/tire ratings.
DOT can take the lessor of a axle or tire rating. I've had them crawl under my trailers to find the axle tag.
Be sure and have your med card filed and up to date along your IFTA sticker. If your a commercial operator then you will know all the rest of your requirements.
If your a new entrant in the commercial hauling world then there are several websites dedicated just for those folks looking for info. Those type forum members can separate internet myth vs how its actually done.
Let google be your friend.