personal experience, but I have a assortment of wood from 2x4x??, 2x10x??, chunk of railroad tie, 6x6x8, yellow leveling blocks, and wheel chocks. I live in WV so u have to be prepared, not much flat land. I have found the best way to level is side to side first and then front to back. I do put wood under the stabalizers because mine have such a small footprint, usually a 2x12x??.
DW of 12 yrs 6yr old girl, Twin 9yr old girls, 9yr Old boy (10 months between the Three)
2010 Suburban 1500
2006 Sea Ray 185 sport
On the hunt for a new travel trailer