We want to camp in Lake Irwin campground and will be driving a motorhome. Is the drive to the campground entirely paved and easily accessible? I read a post awhile ago (maybe Smushie's???) that said something about a slippery bridge by Lake Irwin, which has me wondering if it will be okay. Also, is getting to the dispersed camping just past Lake Irwin also on a paved road. Thanks so much!!!