I’ve done them all lol. 1st thing first....don’t use your friends outhouse. Impossible to get the smell out of the ground lol. We ended up dumping a bunch of lye in the hole and my friends dad said we should just burn it down!!!
If the campground has running water then no big deal, camp near the toilet/shower house. If using someone’s camper be sure to bring spray because not a lot of room so you don’t want to stink it up.
If really rustic you’ll likely be burying your own crap so no big deal there either.
When we fish in Canada I keep a roll of toilet paper and wipes in the boat in case I gotta go while I’m in the middle of nowhere. The smell helps keep the bears away
Bottom line bring air freshener and perhaps poopourri, and maybe wet wipes, you’ll be fine