For Bumper Jacksons, which meld together a lot of those early American genres, preservation isn’t specifically the focus, says Jess Eliot Myhre, the D.C. group’s lead singer/clarinetist/homemade-washboard player. But the music can’t happen outside the sweep of history, either, she says.

“I have a very strong belief that if you’re going to be a traditional musician, you need to do your homework. You need to have a deep understanding of what people were thinking and choosing and wrestling with — y’know, the people that came before you — and pay homage to that,” she says.

Bumper Jacksons play Saturday for the first time at Wolf Trap, and the show — including some songs from an upcoming album tentatively called Never Met a Stranger — will also be their first with a full brass section. That inevitably will make the band a little louder, but creating a “wall of sound” has rarely been the goal, says Chris Ousley, guitarist, vocalist and banjo player (and Myhre’s parter).

“We’re consistently aiming to both raise the ceiling and lower the floor on our volume and energy levels, but we keep a deep intensity in the music no matter the volume level,” he says.

That rollicking, time-tested sound won Bumper Jacksons the 2015 Artist of the Year at the Washington Area Music Awards as well as Best Folk Artist from 2013-15. Myhre and Ousley are joined by bassist and harmony vocalist Alex Lacquement; drummer and suitcase percussionist Dan Samuels; pedal steel player Dave Hadley and trombonist and harmony vocalist Brian Priebe. They say they came together the old-fashioned way, by jamming together at house parties and around campfires at music festivals.

Ousley can riff on a wide sweep of early American music history — he’ll point out that the Grand Ole Opry’s emphasis on simpler sounds meant that country music didn’t have much drums until the ’60s, or that big-city jazz artists in the ’20s and ’30s were “comparable to the Beyoncés of today.”

“I personally get a lot out of the jug band tradition as well as Western swing — both are great examples of country musicians integrating city sounds into their music where the country dances could still work,” he says, adding that “its a surprisingly seamless process” in both cases.

Bumper Jacksons have been striving for a similar kind of overall seamlessness, Ousley and Myhre say.

“Especially in the last couple of years, we definitely are moving into newer territory that’s more focused on our own personal songwriting,”Myhre says. “We borrow a lot of sounds and musical choices or like riffs or harmonic choices from earlier times. But we’re not trying to recreate old sounds in a way that sounds authentic to that time period.”

Bumper Jacksons play the Barns at Wolf Trap on Saturday, Oct. 22.

Bumper Jacksons played WAMU’s Bluegrass Country in 2014:

Jordan Clawson – Camera Man
Bumper Jacksons – Them There Eyes
Big Easy E – Don’t Cry For Me
John Lanou – Hannukah
Dub City Renegades – High, High, High (dub)
Joey and the Waitress – Country Road
Gordon Withers – Cast Into The Sky
Bossalingo – Les Feuilles Mortes
Night Kitchen – Thai Iced Tea
Golden Looks – Rooftop
Mbandi – Destiny
Aquarium – Channel 9
Arlin Godwin – Bangkok Matinee
Junhee – Call for War
Rare Essence – Turn It Up (feat. DJ Kool)
Brian Wilbur Grundstrom – An Orchestral Journey
Jonathan Matis – On the illusion of permanence
The Internal Frontier – Gravity
Motion Lines – Howl
Fugazi – The Kill

Sam Redd – Sam’s Blues
Cheick Hamala Diabate – Djiri Mardje
Demetrius Zozul – Afield
Taiwo Heard – Front Page
TRU Band – The Road Unknown, Yet Known
Gordon Withers – Memories Of The Future
Mission South – Helicopters
Throwing Wrenches – Just Another Day
Fort Knox Five – Cinco to the Brinco (Instrumental)
Bumper Jacksons – Five Foot Two
Projekt Eins – Denouement
Higher Hands – That Shank
Jacob Gemmell – Let It Go
Disco Muerte – Descending
Ronny Smith – City Groove
The_Acorns – Oak Follies
Diggs Duke – The Pinnacle Of Class & Taste
Title Tracks – All Tricks (Instrumental)
Ken & Brad Kolodner – John Brown’s March
Paul Swartzel – My Father Knew Colonel Sanders