Americas is mostly "both peaks" region -however more of EPs will travel around December, January and February. Only Canada and US are entities typically "summerpeak" realizations. Canadian LCs can also supply our projects for May :)
Americas are looking for partners who are fast, professional, friendly and have opportunities in timeline and go massive -if you're one of them Americas can become your top-contributor.
EPs usually do not need visas up to 90 days stay, but need proof of travel purpose, which can be simply good quality scan of our invitation letter.