Just had a look on Google maps and can see the free parking. Nice option if available.
When coming off the M58 are you better to come down County Road or continue straight on Dunnings Bridge Road and then eventually cut a left down A5038?
If you are heading to the Bingo place/area
personally I'd stay on Dunnings Bridge Road until Netherton Way.
then follow the road all the way just past the Mons (boarded up now)
the next set of lights (Bedford Road) go straight down there along Carisbrooke Road.
you might even spot some free parking here
until you come to the junction with the Carisbrooke Pub, then just follow the traffic route/signs around the block to the Bingo place.
or you could follow the East Lanc's all the way towards Everton's ground then just turn down Spellow Lane towards the bingo
**there's several car parks around Goodison as well probably £15/20 though