How about going for a drive to Lake Yamanaka with us tomorrow?
Literal
Tomorrow we [with-と] Lake-Yamanaka [to-へ] drive [purpose-に] go [nominalizer-の] [topic-は] how-about?
いかがですか ('how about?') is a polite suggestion formula. 山中湖 (Lake Yamanaka) is a real lake near Mt. Fuji, popular for day trips. ドライブに行く uses purpose-marking に with the loanword ドライブ.