We used to do tons of outdoor gigs when I lived in the Fla Keys. I also had problems seeing my LEDs on my
midi footcontroller and tuner, even in my rack I couldn't read any settings. I never did find a solution for this. Power can also be a big concern, make sure it's reliable with more than one circut, and stay clear of generators. They can toast your rig in a heartbeat. I'm the kind of guy that likes to bring a lot of guitars to each gig and have them all around my amps on stands. I did this several times in direct sunlight with no apparent damage, but cleaned them all quickly after the show.
*We played a lot of military partys, 2 members of my band were in the Air Force, they were a blast. Good luck and enjoy the summer! *:thumbsup:
G.M.