We have pretty good luck during those hot humid nights using the O2COOL 10-inch battery operated fans from WALMART/LOWES... These fans run off of 120VAC/12VDC/or D-CELLS... Looks like these...

Just moving the air around seems to help us...
We only have the condensation when camping off the power grid where we are not running our air conditioner. It seems the worse enemy is your breath in these cases... We tried not to breath so much but that didnt work out so good hehe...
Nothing worse than waking up in the middle of the night with water dripping on your nose sleeping in the tent bed ends of our OFF-ROAD POPUP...
Roy ken