Never fear, the 1999 enabled yard big RED icon will show the bomb tards right where he is sitting.
Yes, but you can disable ords at enemy fields. And then you have an opportunity... that's what happened in the old times. Ords went down and a few couple of GVs spawned in. If there were one or two Tigers amongst them, the base was in trouble and you could really have a exciting battle, as - in absentia 37mm Il-2 and B-25H - the only thing that could then reliably stop a Tiger was another Tiger.
But of course, in most AH situations the undoubtedly highly perked Tiger II will be playing on home turf only, mostly on concrete...
(That's one general problem in AH ground gameplay - if you spawn in to attack an enemy base, you are basically a dead tank from the start. Few are really willing to gamble a huge amount of perks if the chance of getting "home" in any way are almost nil.)