Pretty much nailed it there, Melkor, which means you can go down if you do nothing to do with the mission.
I don't have a precise number for you, Coll, because I have a more strategoc perspective for the game, so just assume each Star Destroyer carries 'a handful'.
"We can hardly load people into speeder bikes," comments Atar.
I cannot actually think of a worse vehicle to use in a jungle than a Speeder Bike. But bow to continuity I must, and judging by ROTJ that is exactly what they use to scout through such terrain.
Do remember you don't have the slightest clue upon which basis it is thought that Rebels are present. That makes getting evidence near impossible. The only direct lead you have is Andran... and you have no idea on what basis THAt was made, either.
Kyle and co are cargo runners; it's more than their job, it's their life. Still, hard to catch pros in the act on a planet like this- it hardly has a customs bureaucracy.
(Which is ironic, considering who they used to work for).