Best bet is simply to hike the trail. Guides with limited English abilities are usually available at the park's headquarters. There's also no reason why you can't take a mountain bike (BMX) into the park, though rentals are not available at the park itself. Foreigners hiring a guide for the day to hike the park have to fork out 100,000 VND ($US 7) and 150,000 VND ($US 11) if you overnight with him (as in camping, silly). Tours in either dilapidated long-tail boats or more modern motorboats are available for tourists along the Dong Nai to the rapids and to the more distant sections of the park. Alternatively, you can visit these areas via Toyota minibus (accommodating 8-12 passengers) with a Vietnamese guide. Prices range from 150,000 VND ($US 11) to reach the rapids to 500,000 VND ($US 35) for eight hours of touring the park. Some Jeep rentals are available, but apparently only to scientists and researchers (if President Grant is your research assistant, perhaps an exception can be made).