Does everyone know about using a strong metal bar inserted in the bogie mount under the bogie arm. It helps lift the bogie arms without needing to lift the coach really high.I have found that the bottle jack & jack hook combination end up at a pretty spooky angle before a middle tire will get high enough to change. Try it at home on pavement before you need it, and see if you like it. I carry the OEM setup. The jack was red as supplied by GMC.
A piece of an old truck left spring works well.
I'd post a photo, but the gmcmhphotos.com website seems to be down this morning.