What up, Sojo --
I think it will be really hot during your trip, but if you have the guts to do it, you'll do it. You're familiar with the usual disclaimers about hot summer hiking, right?
Going without the sleeping bag might be a good idea, but in that case, yeah, I think you'll probably want some kind of mesh netting at the very least. You might not need a full tent -- can yours be pitched without the fly, mainly as a bug shelter?
There's moisture in the north, even in summer -- you might end up near an irrigated area or a drainage ditch even if you're away from, say, Banias or the Kinneret. And where there's moisture, there's the potential for mosquitoes. I think you'd do well to bring some kind of shelter just in case.
Man, best of luck on the hike, and I hope you post here about it when you're finished!