Greek Island Hopping - additional info urgently needed!

Hi,we are leaving for this tour on Sept 22nd.

We would like to know if anyone ever rented a moped(bike) on the 3 islands and is it advisable? Any idea how much it will cost in Sept-Oct?

Do we need to dress up for the dinners (those provided on the tour, not the optional ones)?

Is internet access easily available on this tour?

Are all the hotels equipped with shower gel and shampoo? (We don't want to lug them around)

Is backpack/wheeled luggage more appropriate for this tour?

We don't drink much, therefore how much spending money do we need?

Hope those who have been will share as much info as you can to those who are going.

Many thanks

*** Our Very 1st Contiki Tour ***