You may want to consider airing up the tire if you have a compressor then setting the bottle jack underneath allowing some distance for the jack to fully retract once finished . I am not against
using the hydraulics to lift the coach slightly to assist in getting the air into the tire. NEVER get under a lifted vehicle without stands or wood blocks holding the frame, NEVER. If the flat is on the rear and if it is
the outside tire you can drive the inside tire onto a block and no jack needed.