May be planting some in pots, plus wire netting over them and sunk in the ground may help. Worth a try? Good luck.

Chiken wire over my pots is the only way to stop them in my garden.
Once they start to grow they usually leave them alone.

Also i have found that if the pots are closer to the house where you go out to your garden they tend to stay away.

i put chicken wire about 1-2" below the soil but over the bulbs. this tends to work most of the time.

I got loads of good advice here on GoY on the squirrel/bulb problem when I was about to plant mine in the Autmn - I tried the sharp sand which definitely deterred the squirrels, they didn't try and dig any of them up. I also grated soap over the areas I'd planted immediately afterwards, which I think also helped. 10 to me, 0 to the squirrels!!!