access. in terms of straps you can get back pack style for both shoulders to keep symmetry. there is also a single strap for across your should, which can sometimes be more comfortable. even a single handle if you already have a different back pack on.
the biggest thing you need to make sure that you do with nylon back pack is make sure your equipment is dry and clean! if you leave dirty equipment in the bag over night or especially longer periods of time, your gear can get mold on it.
the nylon may be nice for protection but it can get hot if you are hauling it from beach 