You may apply for as many activities you want to that are qualified to attend. one thing to be aware of though, when we do slot for activities, we will try to put you into your highest preference that has an opening. If this choice has a date conflict with any other activity, those preferences will be removed from the alternate list. That means if your first choice has a date conflict with whatever you ARE slotted for, the system would remove you from the Alternate list to make it easier for Activity Directors to see who has not been slotted for an activity yet.
"What if I wasn't slotted for my first choice and it conflicts with the activity I am slotted for? How can I hold out for a chance at that activity?"
If you prefer to wait for an opening at one of the activities you were not slotted for, there is no guarantee that there will be an opening but you may email the activity director of the event you ARE slotted for (and cc:firstname.lastname@example.org) and tell them you are not going to participate. They can remove you from the event you're in and make you available for slotting in the other events. You will have to adjust your preferences on your application to be considered for your first choice. You cannot be a primary for an activity and be on the alternate list for another activity if they have a date conflict.
If you do nothing with your payment invoice you will automatically be unslotted from your activtity on April 16 (the payment deadline is April 15) but this will not restore your preferences.