Smaller groups and, as mentioned earlier, generally no Single Supplement although I did pay extra for the upcoming trip because it's a small-ship cruise. It was about $1,000 but if you drill down into the fine print for most tour companies the cost for a single can be 150-175% of "per-person, double-occupancy". Other advantages:
1. The guides are "ask-me-anything" people- the good, the bad, the ugly. I don't want sugar-coating.
2. There are encounters with locals. I've had dinners with families all over the world. I know they're carefully chosen so it's a bit artificial (no fanatic political views, decent English, home up to standards) but I've learned so much. We've met with a sex worker in Peru, a Muslim man whose daughter is dating a Hindu in India (met the daughter and BF, too). talked with a woman who grows coca leaves in the Amazon (the variety she grows is sold in local markets for chewing- good for your teeth and bones, no psychotic effects at all).
3. Their foundation, partly funded by a % of profits, partly donations, supports local needs- a school, sanitary facilities, etc.
4. When stuff goes wrong they step up. In March, 2020 they got us put of Bolivia 2 days before Bolivia closed its borders. I'd made my own plane reservations but they got me on that flight, too.
Send me a PM if you want more. This is turning into a commercial!