I assume you're looking at a chair to wide/deep to slide through the doorway. Most chairs can be disassembled - and that may be necessary in your case. Also, feeding them into the door opening "sideways" and twisting as they come in might also be a possibility. Worst comes to worst, perhaps a smaller chair would be needed.
Good luck.
Alfred
2005 Sightseer with Workhorse, ReadyBrute Elite towing 2003 Honda CRV
Map below shows states where we actually camped.....