Yup, I get to have my ass handed to me by the opening drummer in front of 40,000 people. NICE!!!
Nah, you'll hold your own just fine!
The worst case of this I ever saw was back in the 80's there was a double-billed tour hitting the clubs featuring Ronnie Montrose and Allan Holdsworth, each with their own backing bands. They took turns headlining, and the night I saw them, Holdsworth was the opener.
I went to the show with Pat Travers, who took me backtage to meet Montrose and his band. I got to meet Montrose's drummer - who was your basic garden-variety pro rock drummer. Good player, but nothing special. Very nice guy, too, and very humble. I understood why he was so humble when I saw who was playing in Holdsworth's band: Vinnie Colaiuta was the opening drummer!
Montrose's drummer was DYING. He pointed up at Vinnie and said, "Every other night, I've got to follow THIS guy. What the hell am I supposed to do?"
I've had to open for Louie Bellson, and for Steve Gadd - that was bad enough. But I can't IMAGINE having a cat like that opening for ME. (Not that I'm real worried about that ever happening...

)
Anyway, Gaskill plays great, but so do you. And I wonder if Gaskill can play while puking* like you can?
Knock 'em dead!
*
(Drumgun has migraines, and a puke bucket is an integral part of his kit)