but there is not a lot to go on in the small passage we have to work with
Perhaps there is more in the scriptures that we just have not awakened to. Have you ever seen a pre-trib Rapture believers mention Luke 21:36 as a foreshadowing of the Rapture and Bema Seat? Neither have I, but if you read it thinking of those events it jumps out at you! Jesus not only introduced the Rapture notion in the Upper Room Discourse, He gave a huge hint of it in the Temple Discourse right before the Olivet Discourse!