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If So, which one is the simplest to use for the simplest of people, like myself?

As a fellow tech neanderthal, I can only speak to PhotoBucket my choice for a FREE hosting site.
  Go join and follow the SIMPLE instructions to BULK upload your pics.

  You need to have your trip pics in a file on your computer. When you try to bulk upload them, it will ask you to go to that file on your computer.

If you don't have them in a file PROPERLY the bulk upload won't SHOW that you have pics to upload.

Once you get them uploaded you can NAME the album and go thru and add descriptions to each pic IF you want.

  As you write your trip report, I do mine in Windows Office off-line then COPY/PASTE into the report. You WANT to have your PB account open.

You want to put a pic in, you look to the right side of pic you highlight and you'll see numerous options. HOVER over them and you can either COPY the link OR copy the image to trip report.

I save ALL my trip reports and PASTE the copy to QJ.
Before you POST it, open the PREVIEW.
IF you want the IMAGE to show in the report and it DOESN'T then you can go back to PB and try again because you COPIED the wrong thing.

A little trial and error and you'll have it down pat.
OR ask ANY kid and they'll do it for you.  ;) ;D ;D

Looking forward to your trip report and insights from your first solo.