I have replaced the shocks on my last two DP coaches myself. Put Koni's on the Vectra 3 months ago. A 1/2 impact is the ticket, so is removing the rear tires. On Freightliner coaches the rear shocks are close to the inside rear tires making them real hard to work on from underneath, especially the top bolt. Not to mention the shock bolts are big and very tight. My impact wrench struggled and that was with the tires removed. I dont think I could have done it without removing the tires. Your chassis may be easier to get to and probably has smaller bolts, hopefully not corroded. My front shocks had studs on both ends and were a real bear to get off. I cleaned the threads, oiled them and still they were not budging. Hardly any room for the impact wrench. Ended up having to use a pipe wrench to hold the shock body from spinning while using the impact. I needed 3 arms but only had two. The impact got a real work out because those nuts fought the whole way. I suggest crawling under to check the clearance around your shock mounting hardware to see how difficult it would be.
07 Winnebago Vectra 40 TD ISL 400. Tru-balance, centramatics, Koni shocks