Also I think getting creative with the floor will add dynamics, square flat spots are become drab, put things at angles ,create hills and circular spots. And definitely make sure that everything flows perfectly so you can skate things in a line thus adding options. The best advice I've received thus far was to make EVERYTHING skatable. Down to walls roofs etc. The more things you make skateable is the more options you have and the more space you save on park editor.

Cheers.