Since your yard is sloped, one side of your deck will be above the ground level. Continue the grade beams across the entire deck area anyway. It can get difficult trying to match up a wood post to it.

Level.Up is available in a 12 Pedestal Kit which builds an 8-foot wide x 10-foot long deck using 2×6 nominal lumber. One or more kits may be used for a customizable deck design.

Floating deck cons Susceptible to damage in heavy storms, which can knock ground-level footings loose. Might need to control weeds from growing between the deck boards.