Many campsites are offering grills and picnic tables. This is nice because that is just one more thing you don't have to bring with you. There are some campsites that are pretty barebones and you will want to bring a few items to make it more comfortable.
Folding lawn chairs are light and pack fairly easily. The "umbrella" style or "swing" lawn chairs are very popular as well. They fold up and slide into their own bag simply and quickly. There are also folding cushioned seats, such as stadium seats that are nice as well.
If you happen to have a campsite without a picnic table or you are
in the wilderness, you may need to develop some sort of table areas. You can easily remedy this with a folding
table or a card table. Of course, this will depend on how much room you have to pack, but they are great if you need a table to cook and prepare meals on. You can also get really creative and lash together logs to make a workspace. If you have long logs, you can lash a table up between two trees and you will have a handmade table in no time. Or, you can use rocks and logs. The top of your ice chest can be helpful as well. If you have a tarp, you can place a lean-to shelter over your cooking area to protect it from rain and anything falling from above. Next to your cooking table, place your ice chests and "sink." You can use a big bucket or large pot for hand washing your dishes in.
Enjoy your camping trip and campsite comfort.