Aurora, Oregon Airport Info Needed

I'm going to park my airplane for a night or two at the Aurora, Oregon
airport (UAO) in a couple of weeks. I've only been there once before and
parked for a few hours in front of the Willamette Aviation FBO. They were
super friendly but didn't have a place to tie down; I rolled it off the
pavement and left it sitting on the grass. That was fine for an afternoon,
but for overnight, I'd prefer a tie down. I notice there are a number of
FBOs on the airport. Any recommendations for a tie down at Aurora, Oregon
for a night?

Thanks,
Dennis