I did not cut a hole for it. It is strapped to the inside of my van's interior. -OK
You MUST use common sense, ALL the time. No smoking nearby when the tank is in operation. Turn off the valve when you are not using the appliance it is hooked up to. I dont care what other people do or don't do. That is what *I* do. -Planned on this, Yes, when in operation.
On top of that, you need to check for leaks, when you attach a hose and/or regulator and after that at least occasionally. -Ok, I can do the spray bottle with water and a drop of Dawn. Yes?
Ventilating the vehicle when you are inside using the tank and heater is a MUST. - Yes, understand this and plan not to sleep with it on. Will only run a few minutes at a time.
If you carry the tank on a seat, in that milk crate, use the seatbelt to hold it in place. If you carry it that way often, then you should get a cargo strap (1" wide cam-lock type strap is fine) to go around the seat and hold it steady along with the seatbelt. - Hey I just got a strap for getting out of mud, maybe I can use that?? That would give me a place to put it.
I also have a tank-mount propane fill gauge and CO, propane, and a smoke and fire detector. - I got a lift-type gauge for fill-ups and there's a gauge on the buddy hose I plan to use, not sure how reliable that gauge is but I have the other one to compare. Have co and propane detectors. Got rid of the smoke detector, and I'm the fire detector.
You don't need to be scared of propane...but you DO need to respect it. -That's exactly where I want to be.