I've probably had around 50 or more bites (I work in rescue) and I've only ever had to treat three of them. Two with a course of antibiotics and one (which was really severe, almost to the bone and from an ill cat) put me in hospital.
The rest all felt a bit sore and swollen for a while and then just got better. However they can be dangerous (as my two weeks in hospital testified) so I would hesitate to say do nothing.
What I do however (although you may wish to be more cautious) is to wait to see if I start to feel at all ill or feverish (generally within 12 hours), or if the wound looks especially nasty. In that case I get the antibiotics. But if you do feel like that then you need them fairly quickly - so unless you have an amazing GP surgery that will probably mean a trip to A&E.
I find the best thing for giving tablets is Gourmet Gold Pate or Shiphams (or similar) fish paste (sold for sandwiches - mega yuk!). Both seem to be universally adored by cats and both are very sticky, so you can put the pill in and it won't fall out. Also the strong taste of the fish paste seems to mask the taste of the pill.
There are very few cats I'm unable to give tablets to that way. Any I can't manage get wrapped in a towel and I use a pill popper.