My idea is accepted, will re:publica cover travel and hotel costs?

No. We do not cover travel and accommodation costs. All contributors will receive a re:publica ticket from us and thus access to #rp23 on all three festival days as well as catering on the day of the session. Here is a special feature for Meetups: Contributors to a Meetup receive a 1-day ticket without catering and the option to purchase a reduced ticket for the other two days.