You can set ugrids to 7 in your skyrim.ini but all manner of strangness can occur. Mods like Warzones with crash with this change. However, you do gain a bit of a distance viewing bonus.
After much testing I don't recommend it myself, but you can always try...
Also, if the is Full LOD thing makes your objects invisible, uncheck it. Won't do you any good. Also, that option causes performances issues for some on objects that do accept it.
Pretty sure this is an issue Bethesda says they are working on.