Hi!! Good luck with your goosies!
I am in Texas, too...and I just hatched my first goslings last week (during that whack-job storm that flooded everywhere for two days)
and I am hatching another one this weekend.
To help keep humidity I open the incubator as little as possible and have paper towels on the bottom to keep a little wetness in. When I see them crinkling up dry, I spary water with a spray bottle until the towels are wet again through the holes in the top of my LG.
When it was hatching time, when the humidity needs to be 75%, I placed wet washcloths over the top of the entire incubator (except the windows) and it kept the humidity around 60%, so it helped a lot.
With goose eggs patience is forced on you. Candling at day ten will only make you worry, candle around day 15-20 and check for movement...but unless it looks completely 100% scrambled, do NOT throw it away!
Geese are SLOW...they do four times bigger development with only an extra week added to their hatch time from chickens!
Good luck with your geese! They are the PERFECT poultry!