I use tea tree shampoo and pine tar soap and I've been bitten remarkably little this year.
When out in likely spots I use my bug stuff which is a mix of citronella, tea tree and eucalyptus which seem to work well for me.
With regards having tasty blood you could always try lacing it with garlic which they don't seem to like. Apparently this works just as well from capsules as it does from your diet and might be worth a go.
It seem like anything that makes you smell like a plant instead of a meal is the best tactic.
But you might get savaged by hungry aphids.