I am a wholesale travel agent who only deals with Belize. I do not charge a single supplement but many of the larger agencies & wholesalers do. If they show packages with a per person rate, they usually have a supplement for singles for those reasons stated above. I always quote "per room" not per person. Most hotels charge the same or less for a single room. Some of the jungle lodges do charge a supplement for a single room, but none of the hotels on AC do as far (as I am aware.) Feel free to contact me for more info. I am pretty generous with the Belize info and answering your questions (even if you book it on your own!)
Capricorn in general is good. I used to book through them when I was a regular TA - before they became the competition!!LOL.
It is hard for most TA's to stay in business these days. The internet has hit the industry hard and the airlines, car rental companies, etc. have mostly stopped paying commissions too. I am surviving (swamped actually!) because I just do Belize and hit the niche right when tourism to Belize was just taking off. Many people still book through me even though they could do all the research and book it on their own (sometimes even for cheaper) because I have actually been to all or most of the hotels & sections of the country, and try to give honest assessments of the properties and what I think the client would like based on the criteria they give me. Every place looks good in the brochures (or on the websites!) but many people value the description of someone who has actually been there. Plus I do all the work coordinating the transfers, tours, etc. I do not have a service fee - I just do it out of the goodness of my heart, my love for Belize and of course the commissions I get from the hotels & airlines!
Plus my husband has a real job!! ha ha www.barbsbelize.com