I've used a variety of "deer carts" over the years.
One thing I've found with all of them:
You need to have spare parts, like every bolt, washer & nut.
I put these in a freezer quart zip-lock bag, then duct tape (multiple wraps) to the cart handle.
In the case of the Hawk Crawler, you need to add a tire inflator (duct tape it to the handle).
I've found all the carts I've tried needed modifications to make them work well and be reliable. That includes the Hawk Crawler, which may in fact be the overall best "stock" cart you can buy. But it is a pain to carry around, and the tires are cheap, as in Chinese cheap, poor quality.
If you get a Hawk Crawler, consider replacing the stock tires with some solid rubber tires.
Then it will be even heavier, but at least you won't have a flat tire.
Biggest thing wrong with most "deer carts" is they are manufactured with tires too small.
With exception to the Hawk Crawler, be sure your tires are at least 20" in diameter. 20" or larger makes your cart roll much easier over logs & uneven terrain (especially with a load on it).
Another "hack" trick is to double-up on the tires. Some deer carts used to be commonly available with a "dually" tire kit. Four tires will roll easier & not sink as bad into mud.
Also don't overlook the merits of a waterfowl decoy sled. In marshy areas, they can be the best option.