How Much Propane PSI to the camper?

[2nd House]

Hello All
2014 360 PDEK with two propane bottles
To make a long story short, does anybody know what PSI is required at the camper's regulator for Propane?
I'm having the propane company hook the camper up to a 500 gallon tank.
I do know that on the bottle on the right side (entrance door) there is a regulator with a 30 PSI sticker. This bottle feeds the main regulator where the bottle selector valve is, then feeds the main pipe all the way to the back.
30 PSI seems high when most residential appliances, I'm told, run with 11 water column inch of pressure, which is approximately .4 PSI.
Thanks

[gasman6674]

Your rig has an auto change over regulator that in the top part takes tank pressure from one tank and 30 psi from the other and reduces it to 10 psi then the lower/bigger section takes the 10 psi down to 11" wc (approx 6.35oz). Ok to answer your question, if you maintain your existing system and feed your bulk tank into your auto regulator I would not recommend going over 20 psi, 10 would be better. If you bypass your rigs regulator, then a common twin stage regulator with the proper sized line from the big tank will do nicely. Hope this helps.

[2nd House]

That's what I was thinking.
The 500 gallon tank is regulated at 12 psi directly to the campers right side bottle connector now.
Thus, the camper regulators are controlling the pressure.
Thanks