You're already planning to attend the conference, so submitting a second proposal seems efficient. The travel is the same. The preparation, authorship decisions, and session obligations may be another story.
The handbook discusses making good use of conference participation through multiple submissions. Treat that as a choice to evaluate, rather than an automatic strategy for getting more from a trip.
Read the submission and presenter limits
Check what the event permits, including overlapping work, author roles, and participation requirements. A rule may apply to presenting rather than simply appearing as an author. Use the actual instructions and ask organizers about a genuine ambiguity.
Don't assume different tracks or session formats bypass a stated limit.
Ask whether each submission has a distinct purpose
Explain what each contribution adds and why it belongs in the proposed session. Two submissions should offer substantive work, not divide one thin account into smaller pieces to increase the count.
Discuss the relationship among the projects with the coauthors involved.
Estimate preparation and attendance honestly
Consider revisions, slides or displays, uploads, rehearsal, and the time required for each session. Think about scheduling conflicts and what the event expects you to do if accepted.
Submitting everything on the assumption that some proposals will be declined can leave you unable to meet the commitments that are accepted.
Protect time to participate as a listener
Sessions, conversations, and questions about other people's work can be a substantial part of the conference's value. A schedule packed with your own presentations may leave less room for that exchange.
Choose the balance that serves your purpose for attending.
Compare the additional value with the additional work
A second substantial presentation may be worthwhile when the rules allow it and the team has capacity. In another case, one focused submission and careful follow-up may be a better use of limited time.
Before preparing another proposal, write its distinct contribution, the applicable rule, and the work acceptance would require. If you can't give clear answers, resolve those questions first. Making the trip worthwhile is about the quality of the exchange and the commitments you can fulfill.
Adapted from The New Faculty Handbook by Zafer Unal, pp. 107-108.
