If you’re looking for work in design I would think you’d be better off attending a regional or national IDSA conference where you can meet other designers including those who are looking for folks. Those venues usually have dedicated ID job boards as well for who’s looking to hire and who’s looking for employment as well as portfolio reviews.
Most trade shows have booths manned by marketing or product managers who are usually on very set schedules. There will be tons of designers walking around doing research, but you’d have to stumble upon them or hope to be at the right place at the right time.
If I was on a limited budget I can’t say that’s where I’d spend the money.