While this may be named "Bilbo's Plan", truly, it is Aragorn's Plan. Since both Aragorn and this card have the same trigger, you may sort the order any way you would like. Thus, you can take an enemy, kill with Aragorn, use bilbo's plan to toss a location, the trigger aragorn's ability to pull said enemy out of staging. You could also smoke the enemy again if you have man power, or keep it if you are running a dedicated Dunedain deck.
Tactics Bilbo does like this card in solo play, if you are starving for enemies to trigger his response.
Perhaps a little on the niche side, but definitely a card I'd like someone to bring in higher number player games to try and smooth the locations.