I agree that ear plug could be a good suggestion. We come down from NE PA and take about 2 days to drive it. We stop at truck stops and spend a night (or so) to rest up (Since I am the only one doing the driving). While I like the "Hum" of the Semi's and it puts me to sleep, the DW cannot stand it. She would benefit greatly from ear plugs.
At the campground, however, we have had some commotion, none so bothersome (at length anyway) that much like you, the AC or Fan (or heater/blower) doesn't drown out.
I suppose the portable AC would be good in a Tent, but we have a camper with one built in, so no issues for us there.
Another thing we bring (during our November/December trips) is an electric "Oil Filled Heater" (
http://www.amazon.com/s/ref=nb_sb_noss_2?url=search-alias=aps&field-keywords=oil+filled+heater) I love these things. There is no open element to be worried about. Still have the "Safety" for tipping can be controlled really well, and give good warm radiating heat (think slow and long as opposed to Fast and short). It takes several minutes to heat up but holds the heat (in the oil) for a long time so it's more of a smooth heat and is also very quiet (no fan), as opposed to those with an element that heat up quickly with a fan to blow the heat around.
Even though our camper has a heater, I prefer this because it
- Saves on my propane.
- Doesn't cost me any more (I already paid for electricity with my Site Rental Fee)
- Can supplement the on board furnace if it gets real cold (rarely) so it doesn't have to work to hard to keep up.
- Very Safe (versus open element types).