Personally, As far as the premium loops go(700 is one) I feel the 700 has the most easy back-ins of any loop-the 600 may have it beat now but other than the newer half of the loop most of the sites are not very deep...which can screw you up with the fiver since you need 20' to park your truck in addition to the trailer's space. You might want to look towards the back of the campground(16-1900) Having a golf carts almost makes these sites a no brainer-and they're cheaper too! Remember, you need to specify grade of site and whether you have pets when making the reservation.
This place was built when a 30' RV was huge-and they've done their best to accommodate big rigs but the loop roads are only so big...when it's busy and people park right up to the edge of the road(or even on it!) things can get very tight. There are definitely big sites with access on every loop that your truck/trailer will work on.
If you have a smartphone you can find an app that describes most sites and rates the ease of back-in, I don't totally agree with the rating but the dimensions look aok...search like 'sites at the fort app'
