Yes, depends on the mount. Dont get too worried about the horison, seeing is awefull there, although its handy to start imaging/guiding there so you can go to bed earlier (assuming you are game enough to let it go by yourself).
Id be wary of a flip top, I tried that, and quickly found it was a wind sail that made it tricky to close if it gets windy suddenly, a roll off is easier.
Half a meter to a meter into the ground should be fine, depends on whats in there and how stable it is, dirt, clay, shale, rock.
Heres
what I did.