You'll should be fine with a 1/2 ton and a 6500 lbs trailer. You wont have tons of payload left for the bed of the truck, but I suspect you wont need it.
Great looking trailer, I have no problems with Keystone on my trailer, but I have never actually owned a Passport model. Only thing with that model is it doesn't give your daughter her own separate bed, perhaps you are going to upgrade in the future when she is older.
Enjoy.
2011 Kodiak 240KSSL
Husky Center Line WDH
2014 Dodge Ram 1500 4x4 Outdoorsman 3:92,8-speed,5.7L HEMI
2007 Kodiak 214 HTT (prior)
2010 Dodge RAM 1500 4x4, 3:55, 5.7L (prior)