I am soon to go on my second visit to south Africa and Swaziland. Although my smallish Lowenpro back pack worked quite well for me for my last visit I suffered much anxiety worrying about the safety of my gear in the overhead lockers on the various flights. Consequently I have recently invested in a Lowenpro hard case which weighs 3.5 kilograms and is within hand luggage size limits. With my D1700 body, my 100-400 lense and one other lense the total weight is 7KG the maximum weight now allowed. Mysecond camera body and chargers etc etc will have to go in my checked in luggage. I am not certain that an additional small handbag is permitted in addition to 7KG on the various flights( I am travelling South African Airlines from Australia etc) which is a worry as tickets , passport money tablets need to go with me on the plane. My second worry is that being elderly and quite arthritic I now realize lugging around a 7KG load (with no trolley wheels) in various airports will be quite a challenge. I have searched the web for a VERY small light trolley that would fold up very small and perhaps go in my handbag but no luck. I would appreciate any comments or advice.