Horwich Rail Station is literally opposite the ground, and loads of Blues get the train there based on previous seasons. So this ideA that Bolton fans will 'pounce on people' is laughable. There will be loads of Blues (and police) around.
If Blues in the Bolton Ends are sensible, ie don't wear colours, don't sing EFC songs, if you have a strong scouse accent don't be moaning very loudly about the way we're playing, and just generally don't draw attention to yourself & keep your mouth shut, you will be fine.
This game is headed for a sellout, so if you're thinking of getting Bolton End tickets, do so ASAP as there is hardly any left, just single seats scattered in one stand.