For those of you into camping, I just found out how to make a hot tub for camping. Who knows this might be old news but I'll explain it for those of you who don't know anyway. Get a 12 volt bilge pump for a boat (very inexpensive from an autoparts or marine store), a length of hose and some copper pipe. Dig a hole as deep as you want your hot tub, line it with a waterproof tarp (I've even seen someone put hay down underneath the tarp for comfort. Fill the hole with water. Take your copper pipe and coil it around your camp fire a couple of times. Attach two seperate hoses to both ends of the copper pipe (remember to run the pipe far enough away from the fire so the hose doesn't melt) and run the hoses into the water filled hole. Attach the bilge pump to one end of the hose. Power the bilge pump from your vehicle battery. It'll pump the water from the tub, around the fire heating it up and back into the tub. Now all you need is a whole lot of beer.