Rene,
Sadly I have not got the time for an exhaustive reply.
I have been to the Hula many times and have made many a friend there. The people are extremely friendly.
The Hula is in northern Israel and is on a major migration route. A large area to the north was reflooded some years ago and now offers even more spectacular views of the waders, storks, cranes, passerines, raptors, etc. There is also lots of aquatic life on offer. Overhead the skies in spring or autumn will always be of interest; from Golden Orioles beating north (spring) to the passage of low flying Alpine Swifts and hirundines, especially after rain. On days in early spring a count of 10,000+ White Storks is 'nothing'.
The reserve itself is a must. Within the reserve there is a theatre where a presentation of the reserve is given every 30 minutes, plus the obligatory shop, where you can buy reports, gifts, ice cream, coffee, etc.
You will enjoy a visit in spring or autumn or throughout the winter,where temperatures are low but you will get every WP harrier in good numbers. At dusk the herons leave the Hula to feed on the fields and ponds to the north of the Hula. now you will see hundreds of low flying Night Herons plus the others within the species group.
I do recommend a spring visit.
Reading: The Birds of Israel. Shirihai. Birds of Israel. Uzi Paz.
Accommodation: Lots on offer at Ramot Naftali. Overlooking the Hula...but beware! the Israeli breakfast is big and will set you up for the day. Sadly you will have to sit outside at 7am enjoying the brekky and watch Short-toed Eagles, Osprey, LSE, swallows overhead. It will be approx 70deg in late March early April at that time of morning.
Lunch can be found at Kyrat Shmona to the north or close by.
Don't neglect the fields and do your own finding. In autumn their is a huge roost of Black Kites close to the Hula. In the afternoon these birds arrive and simply stand in the ploughed fields. You can actually drive up to them on the road bordering Hula.
Sorry this reply is short.
If you go to the OSME web site you will find more there. Don't just go to the site..JOIN.
John.