If the person ON the trip can, DURING the trip:
1. Count to 1000
2. Tell the exact geographical location (more oor less) he/she is standing on
3. Tell the date and time
4. Tell who the Presdident of the United States is

THEN that person should feel free to describe, in as much detail as possible, the "reality" thast he or she "sees".

But there must be a way to TEST this description, so the whole experience is _repeatrable_. That's the essence of Science, remember: repeatability under strict conditions.