SPRINGFIELD - Gov. Rod Blagojevich's proposed budget could target everyone from people who use state parks to big business.

Although the final touches are still being made to the governor's latest spending proposal, officials acknowledge they've considered imposing entrance fees at state parks as a way to balance the budget in tough financial times.

Details of what those fees might be were not available Monday and it's unclear whether they would affect users of all of the state's more than 100 state parks, forests and natural areas, most of which are located in downstate Illinois.

Business groups also are prepared to fight the governor again. The Illinois Chamber of Commerce, for example, is concerned Blagojevich will call for a new tax on carbon dioxide emissions from factories and power plants, which could cost companies millions of dollars.

The administration cautions it is not certain the new park fees or the so-called "carbon tax" will find their way into the governor's final draft.

"I cannot talk about the budget proposal," Blagojevich spokeswoman Kelley Quinn said Monday.

Blagojevich will outline his budget plan at noon Wednesday against the backdrop of a national economic downturn.

For a chief executive who has backed high-profile programs such as a universal health care proposal, he faces a tough road with lawmakers who fought bitterly with him last year in an extended overtime session. It was only after months of wrangling that he broke his long-held campaign promise to not raise taxes in order bail out Chicago-area mass transit systems.

If Blagojevich and Senate President Emil Jones, D-Chicago, continue feuding with House Speaker Michael Madigan, D-Chicago, it's a recipe for more gridlock, said state Rep. Mike Bost, R-Murphysboro.

"Without those three agreeing early on, it's going to be the same play of what we did last year," Bost said. "That's sad because it affects everybody that's affected by the budget."

With less than five months left in the current fiscal year, the state is millions of dollars behind in paying what it owes to health care providers. Investment income also is expected to drop in the coming years.

"Given the challenging economic times we face, we need a message of restraint," said state Rep. Bob Flider, D-Mount Zion. "By reining in state spending, we can actually help the economy."

"We've got to get some revenue," agreed State Rep. Brandon Phelps, D-Harrisburg. "I'm not for any more spending. No one wants to pay more taxes. And I never thought I'd say this, but I'd be more apt to vote on a gaming bill than for a tax on people with fixed income. I'm willing to make it because of the dire straights we're in."

If the governor proposes a park entrance fee, Illinois could join dozens of other states that charge citizens to use public lands for camping, fishing and picnicking.

Indiana residents pay a $4 daily fee, or can purchase a $36 sticker for year-round use at its state parks. North Dakota residents can pay a $5 daily fee or an annual fee of $25. Delaware and Florida have similar rates. Out-of-state users generally are charged more.

Kenneth Lowe and Kartikay Mehrotra contributed to this report