Many flight attendants will help - but FA themselves are also getting older so heaving bags overhead is not always an option for them. Plus, while a passenger heaves one bag a flight attendant might be asked to heave a dozen in a day.

The bottom line is: if you can't lift it - don't bring it.

The airline will check your bags or UPS will pick them up at your door and deliver them to your door.

Usually other passengers will help. But realize that there are no giarantees.