I used to do a lot of canning and had a regular set of canning stuff--big pressure canner, etc. However, I just want to make about a dozen jars of sour cherry jam, so I do not want to buy or cart around a pressure cooker or even a regular canning pot with a rack inside. I did buy a smaller pan that will hold about 7 of the small jam jars, but it did not come with a rack. Only the really big pots had racks.
I suppose I could use the old fashioned method where you just seal jars with wax, but I don't think that is sturdy enough to be driving around in my motorhome.
Several of the canning sites say you can use a water bath only method, and put a folded up dish towel in the bottom of the pot so that the jars do not touch the bottom.
Have any of you tried that?