Do you want to do some nature-lovin'? Here are some pointers that will help you ensure it's a good experience for everyone.
If you're in a tent, remember that people can still hear you. And if you have a flashlight, headlamp, or other light source going inside, they can see you too. I would hope you know that a tent is not the place for a candlelit seduction scene. Fire isn't sexy when your tent is the thing in flames.
If you're out under the sun, be conscious of how long you're at it - you don't want a sunburnt bum. Make sure you're well off any trail, even a sparsely trafficked one. If you want to lie down, it's best to spread out a blanket or sleeping bag to make sure you don't get ticks, poison ivy, burrs, ... Standing up is a good option too. When you're doing the deed in the daytime, it's best to stay mostly clothed, on the off chance that someone comes along. You want to be able to cover up in a hurry.
If you're out under the stars, it's probably going to get chilly. Invest in a pair of zip-together sleeping bags or bring a big fleece blanket to huddle under. Keep in mind that sound carries very well at night, particularly over water. So if you're getting frisky at your lakeside campsite, remember that any animal noises or embarrassing exclamations you make in the heat of the moment will in all likelihood be broadcast to anyone on or near the water.
In any case, you should bring whatever protection you're using (condoms help keep things tidy), unscented baby wipes for cleanup, and a couple of plastic bags with twist ties to dispose of everything in. Needless to say, but I'll say it anyway, pack everything out.
Isn't this inviting?
Little do you know...this is backwoods Wisconsin. The mosquitoes there would EAT YOU ALIVE if you weren't prepared. And, P.S., swatting isn't sexy.