How will my female kittens be the week after spaying?

they are two 6 month old kittens, completely indoor cats so they wont be going outside, we are having collars put on so they dont pick the stitches out, how are they going to be for the week or so after the op? they are mainly kept to one room anyway so wont be running around that much, will they be subdued? will they be ok to be left on thier own as normal? i am due to go away for one night 3 days after the op and will be leaving them food and water (its not days just the night) but just want to know they will be ok!