We are a group of middle and oldish age women and are going to take two weeks and drive from London to Inverness in September. Do any of you have any ideas on the best route for us? Should we have our lodging planned ahead or will we be ok just flying by the seat of out pants? We would like to keep our hotel at or less than $100/night. We want to see country, culture and history. Staying in a castle at least once is something we are also interested in. Any tips would help.