At 73, I need every crutch I can find. The Sniper Seat 360
has an adjustable support for a rifle.
It rides around in the back of my Toyota Tacoma. I fold the seat back down flat and turn the support upside down.
That way it looks like some sort of walker and does not attract any attention.
I also use a folding camp chair that rides around bagged up in the back of my 1998 Jeep Wrangler TJ with a Bog Pod tripod.