Yes, I use both on the occasion that the city water pressure is low. Your camper water pump has a pressure shut-off and senses the in house line pressure so it should never put more pressure in the lines than its rated for. The other one that I have seen more frequently is low flow and the camper pump will make up for that too. You should always be using a regulator on the city water but a high-flow-regulator will help.
Well that’s what I do anyhow, seems to work
2011 Wildwood T26BHXL
2004 Yukon XL Denali
43yrs of camping; one lucky guy