In reply to Imedio:
I’d probably base yourself near Inverness, then you are within an hour of some great venues, and can react to what the weather is doing. Pick crags and exposed boulders, keeping a close eye on the wind direction. A frost will help mitigate the midge risk, but until then, a breeze is your friend.
While no where near is convenient as N wales or the Lakes for concentration of climbing, you won’t regret heading up north. Good luck!