Snow Peak makes some really nice gear and most of it is really upper tier pricing but their pack and carry fire places (several sizes available) are very moderately priced considering.
Make sure the burn ban would still allow use of your contained campfire, for example the National Park Service regulations don't necessarily:
"All wood fires are prohibited. Charcoal fires are allowed at designated vehicle campsites. Visitors must use a fire pan and remove unburned charcoal and fire debris."
Basically they allow you to cook over the coals but don't want a fire big enough to warrant wood.
I was camping in southwest ut this weekend. The blm recommended an oil drip pan. I tried it and liked it. I also have a raised fire pit, but to put on the ground to just catch all the ashes, it worked well. The burn spot on the ground went away with the scuff of a boot. Can't really tell I had a fire there!
I made a fire pit for my scout troop out of a 55 gallon drum. My scouts are each making one now. I don’t have any pictures of the complete fire pit but I have pictures of the ones we are working on. The one I built has removable legs. I welded ¾ “pipe nipples to the bottom and made handles out of rebar. I made the legs 18” long per scout rules but shorter legs could also be made. I think you could use a barrel with the removable lid and cut it down, weld the rolled lip to the base and attach the lid for transport. I made a gas one as well I used an old BBQ regulator and 1/8” black pipe. I drilled a bunch of small holes and attached a valve to shut it off. I have an extra barrel if you want it.
I got them from a friends work. They are clean inside. I have a few extra if you want one. My wife would appreciate it if you took one. She calls them the pyramid of shame.