Jeff Gove, Kris Cox and Jon Mills are knotted in third place at 6-under-par 66.
Jeff Freeman and Charley Hoffman share sixth place at minus-5.
Wilkinson collected a pair of birdies in his first three holes, then parred his next four. He closed his front nine with a pair of birdies at eight and nine to make the turn at 4-under 32.
Wilkinson's second nine got off to a disastrous start as he double bogeyed the 11th when he landed in the water. He fell to minus-2, but rebounded at the next hole with a birdie. He then birdied three in a row from the 14th and closed with a birdie at the par-5 closing hole to reach minus-7.
'I holed a lot of 6- and 8-foot putts for birdie coming in,' said Wilkinson, who has only three top-10s in 21 starts. 'I usually feel if I play well, I don't think about it.'
Morland started on the second nine Thursday and parred his first three holes. He collected his first birdie at 13 when he hit a 9-iron to 30 feet and rolled in the putt. Morland, a Canadian, tallied his second birdie of the nine at 18 when he sank an 8-footer.
He parred No. 1, then caught fire. Morland hit a 9-iron to the fringe at two and drained the 12-footer for birdie. He made another 12-footer at three and recorded his third birdie in a row from 15 feet at the par-3 fourth hole.
At the par-5 fifth, Morland found the greenside bunker with his second shot. He blasted out to 6 feet and converted the birdie putt. Morland made his fifth birdie in a row at six when he hit an 8-iron to 15 feet.
Morland had some chances coming in, but left a birdie try at seven on the edge. He missed the green at the par-3 eighth, but saved par, then did not get up and down for birdie from in front of the green at the par-5 ninth.
It was still enough to tie him for the lead.
'I struck it well and capitalized by making my birdie putts,' said Morland, who is 63rd on the money list. 'Right now, for me, they're all important. A victory puts me in the thick of things.'
Jason Buha, Robert Garrigus, Esteban Toledo and Greg Kraft are tied for eighth place at 4-under-par 68.
Defending champion Jeff Quinney shot a 1-under 71 and is part of a group tied for 29th place.