AS far as solid fuels, read up on Kimberly Wood Stoves. Expensive but worth the cost. Very safe and effective! Caveat is it uses smaller chunks of wood, not big logs. But it runs for hours and is a gasifier-type stove.
Wood lasts a long time in the base firebox. There are two fireboxes due to the upper gasifier chamber which burns unburned gas from the lower wood firebox creating much more heat from the same load of wood.
Couple of excellent videos on the site showing installs on a large sailboat and a class C.
The camper install used a drilled hole in the floor to the outside for the air feed to the stove. Thus NO cabin air is in use, as all air draws from the outside air.
The boat install is different in that the air intake is not installed with a hole in the floor! :B
Unforgetablefirellc.com