Peggy - I think you will be happier with 3 days in Myanmar in January than 1.5 days in April. There is so much too see in the country and it is soooo fascinating! I looked at the list of excursions offered and several look good. Would like to suggest that if you do the January itinerary look into doing your own trip to Bagan. Pagodas as far as the eye can see. Mandalay is also interesting but I would rank that city 3rd. I think January would be a better month to go as far as temperature and greenness of the landscape. Also - tour the Shwedagon Pagoda in Yangon in the morning. Since you must remove your shoes at the site, the bottom of your feet can get very burned.
All of this is only my opinion.