As others have already said, I’d recommend adding harmalas. Anywhere from 10mg to 30mg harmala alkaloids sublingually about 30 minutes before a journey makes it much more manageable.

Also, in my experience, a breakthrough distorts time very severely. A breakthrough experience may feel like it has been going on for a very long time, maybe an hour or more, then when I’m finally coming back I’ll look at a clock and see I’ve been gone for only 10 minutes. There is often a “timeless” quality to deep breakthroughs.