How wonderful for you,you'll have a good time Im sure. Hugs Pam.
Wow! That is an adventure! I take it, there won't be a fancy hotel? I googled guyana and it is beautiful and thick with life! Hope you do not meet up with any insects or spiders or snakes! Yes watch out for snakes! Do not itch I heard that there is an insect that if it bites and you scratch it you got it for life! and don't pee while you are in any water! Other than that have a great time!
Sounds more like an adventure- or nature-trip :o)
Hope you have a wonderful time there. I'm sure this will be a very special holiday...
Greetings, Bettina