Having had night sweats after the birth of all my children (I had c- sections) I know how awful it can be! Here is some practical advice on how I coped without going insane and when my mobility was limited...
If you are breastfeeding don't wear a bra and breast pads to bed, put a towel on top of your bed sheet and let this absorb all the milk and sweat during the night, you will be much more comfortable. Throw the towel into the laundry in the morning, or whenever you need to change it, to save you having to strip off and replace the sheet during the night and to avoid excessive laundry when already caring for a newborn. Same goes for a towel over your pillow if you find your hair and neck becoming uncomfortably damp. Obviously you will still need to wear undies at this stage, but I found that wearing anything else (advice is to wear loose cotton clothing) became just another damp thing clinging to you and something else for the laundry.
If you share a bed with your partner I strongly recommend getting two separate single duvets. When you wake up under a soaking duvet flip it over to the dry side and go back to sleep. If you have separate covers it won't disturb them and again it means you don't have to get up and start changing linen or shiver under a damp cover as it quickly gets cold. I found that the wet side was usually dry again by the time I needed to flip it over a second (third, fourth...) time. A single cover also adds to the laundry less than a double or king and if you have had a section a single duvet is less difficult to turn over bleary eyed and sore during the night.
It is helpful to keep a facecloth/small towel next to the bed to grab easily if you are uncomfortable and need to 'mop up' without having to move too much (think under arms, breasts, thighs, behind knees etc) and can make the difference between having to sit up to sort yourself out (not fun after Caesarian) to just stretching your arm out of the side of the bed and grabbing the cloth.
If anyone is reading this, then congratulations on your new bundle and don't worry, the sweats do go away eventually. It is just a shame that it hits you right when sleep is at a premium, but hopefully these few tips might help somebody out there :-)