Unfortunately no, subscriptions are closed!

Have a look at the schedule, the location is defined per pool. 

Yes! For your own home club you can play in the open, mixed and/or women competition if you want. In the case that you are subscribed to two clubs, be aware that you have to choose one home club with which you can play in any competition as a normal player. If you play a competition with the other club you are considered an external player.

The federation only asks from the organizing club to place scoreboards and cones on the fields. (Time or scorekeeping is not included) If the hositing club wants to do more that is fully up to them. This can range from offering food (breakfast, lunch and/or dinner) during the day, have a bar, offer an overnight location, do a party,… The hosting team has your contact details and will inform you in time about what they do/do not offer.

You can send the organizers a message on championships@belgianultimate.be with your question.