I have to say, I've never had shaking problems with the pup or the HTT. Here's what I do! First I'd chock the wheels, front and back. I'd level front to back first. This meant maybe or maybe not using wood blocks for my tongue pole to stand on. Then I'd move on to the stabs. First I'd lower them and crank them JUST enough to make a good solid contact with the ground (or Lynx block(s) or wood). Once that was done, I'd go inside and stand in the center of the pup, square my legs up and wiggle my fluffy self front to back. Ok, check, no movement. Then I'd do the same dance side to side. I swear, it sounds stupid, but I could tell exactly which stab(s) needed more pressure. Go out and adjust, dance like an idiot again, and viola!! Rock solid playground!! I also use this "method" with the HTT and it works just as well! The surface you're on can make a huge difference too. That's why I carry Lynx blocks (only 3 sets so far!!) & wood both. The Lynx blocks tend to sink a bit on dirt, especially WET dirt (like mentioned above), so a good piece of wood under it works wonders. My trip to SC for the Low Country Boil Rally was a near disaster with the HTT. The site actually looked a lot more level than it was. I ended up with two 1x6s under the door side wheels, along with 2 layers of Lynx blocks. The stabs on that side also were massively built up with wood & Lynx blocks. While it was extremely sturdy, it left my bottom step about a foot off the ground!! Being disabled, even the assist handle wasn't getting it. Two of the camp hosts were SO very kind and loaned me their home made bottom step. SAVED my trip!! And I now have the wood cut to make my own first step and a place to store it until I need it. I'll also credit them for backing me in. This spot had trees in the way of other trees!! Don't be afraid to put a little pressure on your stabs. No, they're NOT meant to raise the wheels off the ground!! But a good solid setting is what you want. Try the dance. If you wiggle, you need more stab pressure. Good luck!!