I have manual stabilizer jacks on my 3008W. At most state park CGs where we camp, we are NOT on an asphalt pad. I've found it is necessary to go back out and re-tighten the stabilizers after the first night of a stay, because the 6"x6" wooden blocks I set them on always sink in a bit. We also use X-chocks if staying more than a couple of nights. This is our fourth season in the 3008W. Bottom line, youroo's comment above is spot on. If it feels too much like walking in the carnival funhouse for your personal tolerance, then you should add more jacks. The 3008W is a very springy unit (seems somewhat unavoidable with the torsion axles). It bothered us at first, but we are used to it.
2013 Windjammer 3008W
2006 Chevy Silverado 2500HD 6.0L w/Equalizer 4
Nights camped: 2012 (29); 2013 (26); 2014 (40); 2015 (43); 2016 (35)