EXCLUSIVE: Inside Reba McEntire's Dollywood Wedding With Rex Linn – Country Singer Insists Best Pal Dolly Parton Must Be 'Front and Center' or She'll 'Raise Merry Hell'

Head-over-heels, Reba McEntire can't wait to tie the knot with fiancé Rex Linn, and RadarOnline.com can reveal she's eyeing BFF Dolly Parton's Dollywood theme park as the perfect venue.

The bride-to-be, 70, and her beau, 69, who co-starred on the NBC sitcom Happy's Place, recently revealed their engagement at the Emmys in September after a five-year courtship.

First-time groom Linn actually popped the question last Christmas Eve in Leiper's Fork, Tennessee.

But he and the Does He Love You songbird held off on announcing the engagement because it seemed tone-deaf to share their happy news last January while the wildfires in Southern California were raging.

Though she's considering a fairy-tale wedding at Dollywood, the Grammy Award-winning artist, who's making her third trip down the aisle, is undecided about the kind of celebration she wants.

"On the one hand it really appeals to her to go all out, but another part of her prefers the idea of an intimate affair, possibly in the backyard at her estate in Nashville, which will negate the need for all the bells and whistles," shared the source.

But whatever she decides, "there's no way Reba could go ahead and tie the knot without Dolly being front and center – she'd raise merry hell otherwise," a source said.

As RadarOnline.com readers know, McEntire and Parton, 79, have a sisterly bond that dates back almost 50 years and the 9 to 5 superstar is keen to be involved in her pal's special day.

So she'd be more than happy to allow the bride and groom free rein at Dollywood, her sprawling 160-acre theme park, water park and resort complex in Pigeon Forge, Tennessee.