...mostly my FT-817 or I can go FT-857D if I get the urge...
You can easily work AO-51 and SO-50 with your '817!
Page 45 of the 817ND manual shows you how to program "split frequencies."
Here's a quick tutorial on working AO-51 and SO-50 for you:
Clint Bradford, K6LCS AMSAT Area Coordinator