Since I have a camper from the dark ages, I must pump the hydraulic jacks one at a time a couple inches, then go to the next, all while being sure to keep the front of the camper about 5 inches higher than the rear. Then pull under the camper, and plug in the cord. You then can lower a bit at a time on each corner, until you are seated, and then hook up the tie downs and screw adjust the turnbuckles. Then go back, and remove the jacks so you have both clearance, and can see clearly to the sides and rear!!
WHEW....About 1-11/2 hours to do this and get it centered and set. IT STAYS ON for the entire season!!