Hi Tony, you are right the reccomended treatment for spider bites is to elevate the bite and and treat with an icepack.
Generally only the young and the elderly are seriously affected by Redback bites as their immune systems are either weak or still developing but it's always a wise move to go to the hospital or your doctor.
We don't seem to get many Redbacks around our place, but we do seem to get every other spider species.
One thing we do have a lot of are Scorpions, fascinating little critters. I think they are harmless.