What you need:

A tent!

If you have a little pop-up tent that can fit in your living room you can use that. We have one that fits well and we've used it a number of times. We have also had a ton of fun building our own tent with chairs and blankets. Do whatever works out best for you.

A campfire

If you have a fireplace inside you can set up your tent just in front in use that. If not, you can build a pretend fire with cardboard and yellow/orange/red tissue paper or other supplies.

Camp foods

What says camping to you? Try roasting marshmallows or hotdogs over a fire, space heater, or you can even head to the kitchen and roast them over a gas or electric burner. If you want it to be a full dinner date you can put together some tin foil dinners and toss them in the oven. You could even pull off some Dutch oven delights if you are willing to run in and out of the house. (Do NOT cook with coals indoors).

Activities

Play some card games, sing camp songs, tell ghost stories, or go stargazing with Google sky.

Extras

Set the scene. Bust out a lantern, sleeping bags, or mess kits. Light a candle for that smoky smell. Turn on the sounds of a summer night with the link below.