I am looking to do my first print for a show I'm going to and I was thinking of selling some copies outside the venue. Are there any legal issues with putting the band's name on the poster or anything to that extent that I should be avoiding? Your guidance is much appreciated.
Unless you have been commissioned by the venue, the band or management, or a promoter, or otherwise have some kind of agreement with any of the aforementioned parties, I would hold off on making a poster. Otherwise, it's just bootleg merchandise.
If you have not been in touch with venues, bands, management companies, etc. about the prospect of doing posters for a them, send them an email with a link to your website or portfolio and ask if they'd be interested in working together. Or find local bands, friends' bands, local venues to start a relationship with.
If I misunderstood you and you in fact have established an official agreement, forgive me for the obvious (and unneeded) advice.