It's my understanding you shouldn't drain your battery more than 50% (do a search here on "batteries"). Therefore, you should only be using about 35AH each. Should be able to recharge one battery easily in a day if you're really getting 10 amps from your solar panels.
You'll learn a lot more during your search here.
1988 Coleman Sequoia - popup (1987-2007)
2012 Roo19 - hybid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10