Couple of concerns I noticed over the weekend

PenMan wrote:
Depending on how much you use it, a good battery will probably last a weekend without charging. Use a digital volt meter to check your battery instead of the trailer's gauges. Your converter/charger in the trailer is probably not bringing it to a full charge.

It sounds like you have a lot of air in your water system. Did you fill your fresh water tank? Did you open your valve on the inlet to the hot water heater and close the bypass valve? I'm guessing that you blew the water lines out with air to winterize (I do that too with no problems). You probably just need to open each faucet in the trailer and let the pump run water through it until it stops the spitting. If the pump still runs after you are sure you have completely filled all your water lines it is time to start looking for leaks or problems with the pump (for example the pressure switch). Hope this helps.

Before we left I filled the fresh water tank.
I had the dealer winterize at the end of last season so not sure how they winterized it.
We went camping last month so I did open the inlet valve and outlet valve to the water heater, and closed the bypass valve at that time.
I figure I may be sucking air somewhere in the pipes but not sure how to check or fix that.