Helicopters? Not only do the TTP and BLA have no trained pilots, even if they did, they'd be shot out of the sky as soon as they take off, by the Pakistani air force. There is absolutely zero chance Pakistan would tolerate any militant group to operate large air assets against Pakistan.
If you're talking about trucks, the TTP and BLA wouldn't able to operate them within Pakistan, as they'd be bombed instantly. It's not like in Afghanistan where the TTP and BLA have huge spaces to drive around and do whatever they want. A miliyary truck convoy would instantly be detected if it crossed into Pakistan, and would be destroyed. Besides, these vehicles are expensive, and the ttp and BLA wouldn't be able to afford them. The AT would also likely not want to sell them, as they take over more territory and transition to conventional warfare. These trucks, MRAPs, and IFVs would be invaluable assets to the taliban, as they transition to conventional fighting style, moving away from their guerilla tactics they've been employing against ISAF forces in Afghanistan for the past 20 years. There is only a very small chance that the AT would sell them to anyone else.
These are military vehicles, there is no way to hide their presence.