Yep, that's my technique too. Mine will be different than most since I have 416s with heavy springs on the back and Progressive springs in the fork, I use 55psi on the rear and 0 in frontwith the woman who hangs around here and I on board. That amounts to a little more than the recommended maximum GVW. We don't bottom outand the bike handles fine as frog hair.Most of us generally adjust the suspension so it doesn't bottom out when loaded up. That generally means adjusting to the highest setting.
According to the instructions that came with my Progressive 416s which probably will be different than OEM shocks, the drill is to put the bike on the center stand and measure the distance from the rear axle to the bike frame. Then take the bike off the stand load it up with rider, passenger, gear and remeasure. The drop should be 1-1.5", adjust the air pressure to reach this measurement. Max pressure with 416s is 100psi but pressure over 70psi will decrease shock life. Progressive says 10psi for each 50lbs of additional weight.I'm sure I read of a "proper" way to set it up before on this forum but I can't find it now. My way is to load teh bike up with the passenger and kit and then adjust the suspension up until the back of the wing is about the same height that it was when I was riding solo just before I loaded it up.