Just a short 2.75 hour drive from Boise is Anthony Lakes and lots of great places to camp. The drive is a very easy drive from Boise and is mostly freeway. The campgrounds are at around 7,000ft and are a perfect places to stay with your campervan. There are two campgrounds near Anthony Lakes. The main Anthony Lake campground has 27 sites for campervans on two paved loops. Many sites have good privacy and lots of rocks for kids to play around on. The Mud Lake campground is a little ways from Anthony lake, but still provides some great sites.
From the Anthony lake campground you will find easy access to the lake on a number of trails. There is a trail that will take you all the way around the lake and there is a boat ramp to launch small boats or SUPs from. Kids will find lots of places to play along the lake. There are no sandy beaches at the lake so keep this in mind. We recommend water shoes for kids who plan on wading or swimming out in the water since the rocks and submerged logs can be slippery. Fishing is pretty good on the lake, but you will need a fishing license. A fishing license can be obtained in Baker City.
From Anthony lakes you will also find a large network of hiking and biking trails. Here are some helpful links to get you started.
Campervans available for rent in Boise, ID and Salt Lake City, UT.