2 stroke will be fine. After all, the engine is just for bugging out, i.e. getting out of Dodge while the gettin's good. Once outta Dodge and settled into your B.O.L, you won't be in such a hurry and will have a need to be quiet as you travel around patrolling and looking for necessities. So you will probably want to take the engine off to minimize noise, weight and drag.
Wait a minute; what am I saying?
Wait a minute; what am I saying?