We have overnighted many times in Walmarts parking lots. Most were very large, with places off from most used sections.
Many if not most Walmarts have security guards driving around at night.
Never were bothered by noisy teenagers or really anyone else.
At a few. the parking lot sweepers (somewhat like a street sweeper) was a noise bother. But not for too long.
We have used Wally Worlds to overnight in Las Vegas, NM, Pueblo, CO, San Antonio, TX, Wichita Falls, TX, Lubbock, TX, Eagan, MN (next year closed to overnighting), Liberal, KS, Pierre, SD, Goodyear, AZ, Santa Fe, NM, Spearfish, SD (now do not allow), Cody, WY, Trinidad, CO & at Sam's Clubs in Fargo, ND & Glendora, CA (don't believe they allow it now).
An Aid in Finding WalMarts that Allow Overnighting:
http://www.allstays.com/c/wal-mart-locations.htm
Personally, I like the "Map of Walmart Stores", such as
http://www.allstays.com/c/walmart-ne...ations-map.htm
Red W = No Overnighting
Yellow W = Overnighting is OK
Also gives phone numbers & address of the Walmarts.
They have all had other RVs overnighting. Once I had to move to another parking site in Spearfish, a large MH parked next to us (we were in a small MH then) & was blocking any cooling breeze. In Trinidad, I asked a MH if he needed to park so close to our
Scamp. He asked why & said he would be blocking an breeze from us. He moved down a little from us.
The morning after an overnight in Trinidad:
Cody Walmart was our neatest Walmart Overnight Site yet:
Only noise from teenagers (maybe teens) was in San Antonio. We had moved from the more lighted Walmart parking lot to a nearby Home Depot parking lot. After closing time, we were awaken by the sound of baseball bats hitting baseballs.
A baseball "game" was going on closer to the Store. Not wanting a fly ball to bounce onto the MH, I drove it back to the Walmart.
Other Overnight Parking:
http://www.allstays.com/c/camping-ov...rv-parking.htm
RRJR, Way back When, we did an overnight in a church parking lot (after asking permission). We were having a little trouble shifting with our pickup & wanted someone to ask about it. Turned out just need transmission fluid added. Towing a Komfort Lite back then. Even used their water for showers. Parked next to a grass lawn. In Buffalo, WY. Early '90s.
We noticed many RVs overnighting at Fred Meyers in Alaska.
We have found these sites useful in finding nice overnighting sites:
http://www.freecampgrounds.com/
http://freecampsites.net/
Such as the one in Wheatland, WY:
http://www.freecampgrounds.com/detail.aspx?id=1757