Not easy but I'd life my spouses mother from the chair and carry her up the steps into a motorhome - later into a 5th wheel we bought. Then I'd carry the wheel chair. She was less than 100 pounds and I was younger and stronger then. Not the ideal way of doing it.
Bob, Sandi & Marmaduke the Big Pug and Tasha a Frenchie
SW OREGON Winnebago Outlook Ford V-10
If towing: a 2006 Mini Cooper or 2015 RAM Limited 4X4 or a 86 El Camino on a trailer