Here's my solution to the tractor carry problem, a belly pack:
www.tommysgunpack.com - Home of the Original Tommy's Gun Pack!
(That's a fanny pack worn in front.) When I ordered mine online
they sent me the left-handed model by mistake, but one email
fixed that at no cost to me. That left a net positive impression.
I use it with a P229 in the quick-access main inner compartment.
There is room for a spare mag or two in the outer compartment,
and for wallet, keys, cellphone, GPS in the other inner pocket.
On two occasions I have drawn and chambered a round in preparation
for shooting feral hogs. They are legal to shoot at any time here. It took
a couple seconds.
The pack also works well for hikes on and off trail. It gets dusty on the outside
and needs brushing off after a day in the woods and fields, but the gun stays
clean. Also, there is a barrier of waterproof padding between me and the gun,
so sweat stays out of the gun compartment.