Your question (and many of the answers here) seems to assume that heaven will always be an immaterial, ethereal place in the clouds, but this is not really Catholic doctrine. In reality, when Christ returns, and following the general resurrection of believers (when soul and body will be reunited once again, as God intends), heaven will, quite literally, be “a place on earth” (see, for example, 2 Pet. 3:13; Rev. 21:1).
Thus, we will not all be disembodied spirits floating around on the clouds. Rather, we’ll be glorified human beings—unified body and soul—just as Jesus was after his resurrection. That being said, Jesus certainly recognized and interacted with the disciples prior to his ascension. He talked with them, opened the scriptures to them, even ate with them. It appears that there certainly will be a relational continuity between individuals from this life to the next.
Gaudium de veritate,
Don
+T+