One of the most successful Idaho state parks will try to double down on that success next year.

The campground at Henry’s Lake State Park in Island Park is set for an expansion project that will nearly double the number of spaces available, the Rexburg Standard Journal reported.

The park has 43 sites now. The $2 million expansion will add 30 sites to the popular campground on one of the hottest fishing spots in the West.

Keith Hobbs, manager of the Henry’s Lake and Harriman state parks, detailed the plans last week in a meeting with the Fremont County Commission.

He said the state Department of Environmental Quality (DEQ) has approved the plans for the septic system for the expansion, which will be located east of the existing campground.

Funds for the project came from an RV grant made possible by RV registrations.

“Next spring you will see the work start,” Hobbs said.

“We’re trying to capitalize on a market that already exists,” he said.

Both parks are located in northern Fremont County, and both are headquartered at Harriman.

Fremont County also operates Frome Park, a campground, boat launch and dock site on the western shores of Henry’s Lake.

Hobbs said the degree of use of Henry’s Lake Park is directly tied to the fishing on the lake. If fishing is good, the campground is heavily used. This year fishing has been good and the park has had a “better year,” he said.

He also reported that Harriman Park had “a good, but not record-breaking year.” He rated visitation at Mesa Falls Recreation Site as “outstanding” this season. The state helps the Caribou-Targhee Forest manage the site.

The Mesa Falls site is a tourist indicator for Island Park, Hobbs said. “When (visitor) volume is up there, the rest of Island Park seems to have a good travel season.”