I turned it off on my car because the thing would go bonkers all the time. Pass by the tree next to the driveway? Park in a parking garage? Go through a drive-thru? BONGBONGBONGBONGDIGNDINGDINGDING! I've not had any issues since turning it off. The vision-based parking lines are mediocre at best anyway.
I used a bike rack and other than it acting as a parachute there were no major side effects without trailer mode active. I did occasionally have a phantom car riding my bumper, but I see that with a trailer hooked up too.
I guess you could rig up trailer mode permanently with some sort of adapter or plug-in auxiliary light, but I'd just turn off the park chimes.