Yes you can.When I made our ressies I asked the CR and she said no problem.I have charged our balances the last few times we 've stayed there.Last year I charged it thru AMEX and received some xtras but now that Amex and Disney have severed ties I will do it thru another CC.
I plan to do this as well and also pay off the other families ressie that is traveling with us with my Disney Visa. Gotta love it, almost like getting a little discount.