Best way to allow users access to nodes they create?

I'm looking for a simple way to allow users to access the nodes they create during the checkout and order process, after the order is submitted. Ideally, they would access through the orders that are listed with their user account and ideally, this would be read-only access.

In this case, the nodes are represent participant registration, so we want to give users who have registered a way to print out the registration node itself, instead of just the invoice (which doesn't contain very much detail). We can direct them to print when they are filling out the form, but of course many people will not do this or will lose track of what they have printed.

Thanks in advance for any ideas.