The simple answer is yes, we leave our battery connected all the time even whilst parked in storage, the only time we disconnect ours is to bring it home for charging which is done once over winter due to the fact it has a tracker and alarm powered from it.
Dunc.
------------- Why have kids when you can have a dog?
Discounted Insurance Quotes for UKCampsite.co.uk visitors! Up to 12.5% off!
ours is connected by EHU at home full time from the shed.its on a timer of about 4 hours a day this keeps the battery fully charged for next time we go.have done this for years without a problem.
------------- the only silly question is the one you do not ask.
If you disconnect the battery then it will not receive any charge whilst hooked up. The charger will not be working and that in turn would probably affect the use of your 12v DC system (lights pumps flush). The Hook Up runs the DC systems - fridge sockets. Further, if you leave the battery wires free when travelling they may just touch and short your 12v system. Probably just blow a fuse, but its best not to go there anyway.
Phil
------------- If you're not on a fell your wasting your feet and for 2014 it's.......Feb Castleton Mar North Yors Moors; Apr Sutton on Sea; May Thirsk; Jun Clapham/Riverside (Lakes); July Wharfedale; August Crakehall; Sept Knaresborough; Oct Wirral Park/Clitheroe