We are going on Alaskan cruise last week of August. Any pointers on what is needed and advice in general are appreciated! TIA (thanks in advance).

I searched thru some old threads and lots if good ideas. Here is what I gathered:
- weather is on the cool side, low 70s? Cardigan/jean jacket enough?
- May rain- how likely is for late august? How heavy is typical rain?
- is waterproof shoes necessary? We won't be hiking but like to visit all the ports/towns/cities.
- any special consideration for kids?
-anything else?