u/Lesko_Brandon_0kool

My house has 2 big (not huge) tanks at opposite ends of the building. One tank fuels a stove and the other fuels another stove and a nonfunctional heater. I’m pretty sure those are all 1/2 flare connections. There are a few Propane appliances I want to hook up:
Gas dryer (I think 3/4”) MIP
Generator
A replacement stove that uses 3/4 or 1” MIP and has a regulator with it.
A smoker that uses a grill OPD connection
A grill that uses a normal OPD connection

I will never use ALL of these simultaneously… but I am clueless about how Propane works (I understand connecting the plumbing but not the tank types, pressure/regulators etc. )
Our propane guys have tried to talk me out of connecting to the big propane tanks because they say it is impractical. To me, it is more impractical to haul around a trunk load of little tanks to get filled… and the big tanks get serviced on site anyway. My tanks both have regulators at the tank. What do I need to know about hooking up these appliances?

I have an audio amp I want to install in a passenger van. The van has 5 speakers so I want to add a speaker to make three rows of stereo. The amp is a 6-channel. I want to be able to remove seats for occasions where I need to transport larger objects, like furniture or wheelchairs so I have to remove seats to make room. The amp will be installed with 8ga power, 8 ga ground and whatever speaker wire for 13 connections- 12 speakers and the remote wire (pretty sure it’s 14ga. ). All cables are stranded copper.
I want quick disconnects to prevent wear and tear on the amp’s fittings and so I can avoid tripping the fuse. What connectors should I use? I’ve installed plenty of amps before but never needed one to be removable. I appreciate any thoughts on this.