Spraying Peppermint extract (2 TBS. per gallon of water) has worked well for me. It needs to be applied every 7-10 days, sooner after a good rain. I buy it by the quart from Olive Nation
Pure Peppermint Extract - TTB the least expensive place I've found it. They sell it in smaller bottles if you want to try and experiment with it.
I mix it with my organic pesticides so as to spray in tandem saving a trip, up to that point it needs to be done usually after a rain. Deer normally eat beet tops, beans and corn. Since using this they will walk through the garden but not even offer to browse on anything. Seems to work for groundhogs and squirrels too. Rabbits are rare here with all the feral cats people have dropped off from in town. We'll see about Coon this year as this is the first time growing sweet corn in 4-5 years.
I use a 2-gallon pump sprayer to apply, it will cover the entire garden with a little left over. Just mist the plants well, it doesn't need to be dripping off. I usually do it in the early evening, so it has a chance to dry.