It’s time for summer fun, and with the traditional start of the season over Memorial Day weekend, merchants are ready.William Archer, vice president of boat rentals with Port Royale on Lake Lanier in northeastern Forsyth County, said he’s looking forward to a busy weekend.“We’re showing signs for a good season to come,” he said. “We’re anticipating really good gas sales and rentals are really busy.“Surprisingly, the thing we’ve seen that was most affected by the down economy was boat sales, and this year those are up 20 percent from last year.” A bit farther south on Lanier, Joey Jones, manager of Marine Max, a boat dealership and service center at Bald Ridge Marina, echoed Archer’s sentiments.