It would seem not. Certainly not much.
Donations to Family Radio were huge over the last few years, but it does appear that the money was spent on advertizing the date of the Apocalyse, which was of course the point. This article talks quite a bit about the finances of Family Radio:
In 2009, in the last Family Radio tax return that was made public, the group collected $18.4 million in contributions, and earned more than $1 million in investment and other income. That year the group spent $36.7 million, and $41.2 million the previous year.
"Donations have picked up, but not enough to offset the amount of money we're spending," said [Family Radio board member Tom] Evans
In other words, Family Radio was spending more than it earned on the Apocalyse.
Camping says that he works on a voluntary basis for Family Radio. Charity Navigator, with which Family Radio has a 4 star rating, backs this up.