If the need is just a localized area to set a camp stove onto then there is a very simple and relatively inexpensive solution. You can buy a silicone mat that is used in an oven on a baking sheet pan. They make them in an XL size for commercial bakery sized ovens and pans. 24.5" x 16.5" It can be rolled up and stored in a drawer or cabinet when not in use. They are heat resistant for temperatures up to 480 degrees. That will protect a plastic table top. Of course you could also put a layer or two of towels under the cooking mat for extra protection if you are not a trusting kind of person.
The mats are also handy for rolling out things like biscuit dough or just for protecting the counter when making a messy project. They are not suitable for use as a cutting board.
People who spend time in kitchens as well as having a need for a non stick surface to use for assembling stuff that gets glued or painted know about such things. I would be one of those persons, I own one of these mats as well as some silicone place mats. I use the smaller and thinner silicone place mat under my single burner dual fuel stove on my laminate covered countertop or out on a wood picnic table. My cooking outside table is aluminum so I don't need it for that surface. I don't carry the larger sized baking mats around as I don't need it for on the road life.
I also use the mats when I am working on a project where I use a hot glue gun or soldering iron or a small butane torch. Better than a burn mark on the counter if the tool falls over and/or off it's rest. They stick to the counter, they don't slip around so I also use them under my cutting board to keep it from moving when I am slicing stuff up. Or they will keep a mixing bowl from sliding while you stir stuff up. Oh also nice to put down on a wet picnic bench to prevent getting a soggy bottom or to put on your car seat if your clothes are wet or dity. You can even use one to set your dirty, wet shoes on when you take them off as you come in the door. Use it under the pet's food and water bowls. Also a good surface for setting down food when working on a picnic table that is not all that clean. They don't blow away, they grip to the surface, because they are non-stick they are easy to clean. So all in all they are very handy little, multi-purpose mats that are a nice convenience to have along in a nomadic rig. Buy a couple of the silicone place mats, you won't ever regret having them. Maybe not an essential item, but most definitely a good investment of only a few dollars.
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Keywords: silicone baking mat commercial size
Keywords: silicone place mat