As a long distance traveller.. I would be more likely to attend if there was a Vancouver show one weekend and a Miami show the following weekend.
Might work if both organisers did a discount for sponsoring both events.... and had a reason to help promote each others event. They might even find a way to cut costs with a bookend event schedule.
If it brings in a lot more International webmasters than usual that could cover the higher costs of doing 2 shows for sponsors too.
Might even get Nick to Florida if we do a "cannonball run" from Vancouver to Miami over the 4 days between shows