Go, get more feedback. Even some rough edges during the conference won't matter as that won't be seen usually. The mistake almost all founders make is not get

Go, get more feedback. Even some rough edges during the conference won't matter as that won't be seen usually. The mistake almost all founders make is not getting enough exposure early and working on the specific feedback, there really is almost no such thing as too much exposure. If I was you and the conference fees work with your budget I'd be there, in fact if it wasn't in the budget I'd be trying to find the money to make it work so I could go.