I was looking into getting some hoof boots for my gelding- he's barefoot right now. I really wanted to get something that would prevent his hooves from cracking and chipping,
Hoof boots can be a great investment but they ain't going to stop cracking. That happens when hooves become overlong &/or separated & infected. If your horse's hooves crack &/or flare, more frequent & well balanced trims would be the first & major thing I'd think is needed. Likewise generally with chipping too. If the horse is well trimmed, that's not likely to be an issue.
since I'll only be using them for 1-2 hours (or less) on trails in the summer.
I would really like to know how these hold up with loping and galloping, on dirt roads, and in water. Did any of you have any problems with rubbing or fit?
Really, the best boot for your horse is the type that fit him & suit him best. So I'd measure him up first for a start - you may find that one of those types(or both) aren't appropriate for your horse anyway. Cavellos are a slightly wider boot. Depending on the shape of the hooves, this can sometimes cause them to be unstable. They're marginally firmer in the back section, which can make rubbing more of an issue with some horses & hoof confos(eg. IME not the best on low heeled horses.). I also think the tread is better on the Trails.
Assuming the boots fit well, they should all hold up to normal riding & going through water, etc. Deep mud, ice, jumping & such can be a challenge for most boots. If you're going to be doing any hard/long riding, I would also choose a low profile type like Epics, rather than the ones that fit around the pastern.
If you're new to boots I would seriously recommend using a boot fitter, or a trimmer with a lot of experience with boots, which may mean your existing farrier is not the best person for that.