From the Wikipedia entry
"The British National Formulary recommends a gradual withdrawal when discontinuing treatment to avoid acute withdrawal syndrome or rapid relapse.[39] Due to compensatory changes at dopamine, serotonin, adrenergic and histamine receptor sites in the central nervous system, withdrawal symptoms can occur during abrupt or over-rapid reduction in dosage. Withdrawal symptoms reported to occur after discontinuation include nausea, emesis, lightheadedness, diaphoresis, dyskinesia, orthostasis, tachycardia, nervousness, dizziness, headache, excessive non-stop crying, and anxiety. "
I actually registered to say that this is probably a not-great idea. You might have enough response at the receptors to get off 50 hours after the last dose, but the above would be pretty much a laundry list of " Things that will turn a trip into a nightmare". A first trip is nerve-racking enough w/o complications.
If you're going to go ahead with it, please please please have a sober sitter and a hefty dose of a quick acting anti-psychotic on hand- and make sure your sitter knows where it is and how to dose it. I like Seroquel myself- It's come in handy more than once. I don't know what your experience is with anti-psychotics, so I can't recommend a dose. I know that 50mg will pretty much floor me, but my wife takes 4-500mg nightly as a psych med, and sometimes even that won't put her down. So YMMV. Have enough to meet your potential need.
I dunno- Mebbe wait for a better time?