That's one great thing about U and IOA is there are not too many rides you "chickens" have to miss. Probably just the 2 main coasters Hulk and Dragons, and the Doom Drop, all at IOA, (I love huge coasters but skip the drop myself, just not a fan of drop rides.) I really don't think there is anything in the old U park that you should or need to skip. The Mummy is the only thing remotely scary and I would highly recommend you riding this however, you will miss a truely great ride if you skip it. It is really more of a theme ride than a roller coaster. Its not really a roller coaster at all. It does get fast at the climax point, but its all indoors and not your normal twist and turn, go upside down type coaster, it just gets fast, so I think you guys can handle it.
Tame rides you can do, everything at the old park. At IOA Spider Man, Jurassic Park River Adventure (Best ride at IOA don't miss it!!), The Dr. Suess ride, the shows at the Lost Continent, the Triceratops adventure in Jurassic.
Dudley Du-right falls is a really great log ride type of thing. This would be the only other ride that comes to mind that may be on your maybe list. It does have a drop and you get a little wet. But other than that, just avoid the 2 main coasters and the Doom Drop and you'll be fine.
Oh and Tracy you will love the Royal Pacific, that's where I always stay, best hotel there in my opinion, and the cheapest. I would recommend asking for the top floor and an IOA view. Greatest view at the property. That's what I always request, that IOA lighthouse veiw is so cool and unique. That's one of my favorite things about going is that view of IOA from the R-Pacific.