Today, if you buy reputable brands, it's hard to buy "bad" gear.

The pack you're looking at doesn't fit the category of "reputable."

As a general rule, there are three variables: lightweight, inexpensive, and good quality. You can pick two.

At $30, you probably can't make a really bad mistake. Like others said, if it's a free return (no freight) order it and see. After you send it back, follow the other advice: use your Camp Trails pack (I really miss mine; long gone) for now, work out the details of the rest of your gear (some may still work well, others you'll want to replace - the Eureka Timberline tent you may have leaps to mind.) AFter you're done replacing things, take it all to a reputable store, and start trying on packs. Fill them with your gear, not the sandbags they have. Sandbags don't give you the same distribution of weight that your gear will, so you can't tell how well the pack will carry unless you use your own gear. It will also tell you how well your stuff fits in the pack (too large a pack is almost as big a problem as too small a pack.)

If you like your external frame pack, but want the ride of an internal frame pack, be aware that there are both pure internal frame packs and hybrid packs that combine the best of internal and external frames. Pure internals will nestle the back of the pack against your back; the Deuter ACT series and the Osprey Aether and Volt are examples of true internals. The hybrids are usually identifiable by the "trampoline" suspension (like the backband on your Camp Trails pack), with the same space between your back and the back of the pack. In particular, the Osprey hybrids (Atmos/Aura and Exos series) are really comfortable. For loads around 25 pounds (including food and water) the Exos is a good choice; for loads heavier than that, the Atmos (men) and Aura (women) are really, really comfortable (but at 4 pounds, a bit heavier than most.)