I use blocks (Lynx levelers--have had them for a few RV's now) but don't guess. I installed a
Level Mate Pro which reads out, in inches, how much I have to raise each corner. The blocks are about an inch each so its pretty easy: pull in, read my phone, put out the number of blocks indicated and pull up on them....done.
Also a lot cheaper than any hydraulic system.
In many cases I haven't had to do anything at all just park and enjoy.
So I guess Option "C" sort of.