No, you will not lose access to your trips information if you decide not to renew your paid Escape subscription.
If after one year, for example, you don't want to renew your subscription, your account will be downgraded to the free Excursion subscription.
At that point, you will have free access to everything you added during the year you had your paid subscription.
You will have access to all of your information, however, you will no longer be able to edit or add to it.
You will still be able to view your trip information and also share it with other Planning Motion users.
When you want to plan trips with Planning Motion again, you can switch back to the Escape plan and regain full access to your information.