While I do keep my camping stuff ... I came across this fire pit last week, I liked the look of it and it was ultra portable and packable which is just my game.. Not sure if it is what you were looking for, but interesting regardless Tembu Tusk Propane Firepit... More on overlandbound.com

Try one first...I've been camping with some folks who have one and was pretty underwhelmed, especially given the propane used. Not sure what counts as "decent warmth" for you, but I thought there were mainly psychological. But that might be enough; the light and something to gather round are often what people want most. More on reddit.com

I use an Outland propane portable pit and it is AWESOME. We love it for a few reasons: It is legal to use during level 1 fire bans in most CO counties, when burning wood be prohibited. Zero smoke, zero sparks. Wildfire danger is extreme in our area, and this is a much safer alternative. It is really easy to start and stop - no bucket brigades to make sure it is fully extinguished It is convenient when some added warmth would be welcome, but a real wood burning fire would be a hassle. We start it up while making breakfast before going hiking/climbing for the day. Debatably more spatially efficient than packing in your own wood, especially if you're already taking propane for other grills/stoves. More on reddit.com

fireside outdoor makes a nice pop-up fire pit. It collapses down to about the size of a collapsing camp chair. You can get it with a heat shield to protect the ground under it also. It not cheap, but definitely cheaper than the solo stove fire pits. As for starting a fire, just buy some firestarters at the store and watch a YouTube video. If you have a constant flame source like a firestarter, it will be fairly easy to get the fire going. More on reddit.com