I will give you the most important tips for observing through a telescope at the observing events, but also here I want to give you some other tips in advance:
For the evening observing events, protect yourself against mosquitoes. Wear anti-mosquito repellants, and also clothes with light colours and long sleeves and pants. This applies for the evening observing events, especially for the evening observing events from dark location far from the city.
Also for the evening observing events dress in warm clothing, as the temperature start dropping fast as soon as the Sun sets. This also especially applies for the evening observing events from dark location far from the city, where the temperature is usually 7-8 degrees less than in the city. Also count on the wind, even if in the city the wind is minimal, at the locations out and far from the city can be strong and cold from north direction. This regularly happens in spring and fall. Bring hat with you. For example you will leave the city at 7 pm and temperature of 18 degrees, but at midnight at the observing location the temperature can be 4 degrees with cold strong north wind.
At the Sun and planets observing events during the day can be hot. It is not bad idea to bring with you umbrella and a lot of water to drink. Wear hat. Do not look at the Sun with naked eyes. We will observe the Sun only through the special telescope for observing the Sun and through the small and the big regular telescopes which will be equipped with a special sun filter film for observing the Sun.
When coming at the observing events with a car, especially at the evening observing events and also more importantly at the observing events from dark location, please take a U-turn with the car and park it with the headlights towards the exit, not towards the place where the telescopes are located. You will arrive there at daytime and will not think about this probably. This is in case you want to leave the observing event earlier. In that case, your car's headlights will do minimal harm to the night vision of the other people attending the event. As you probably know already, the human eye needs 15-20 minutes to adapt to night seeing, and even 30 minutes for total adaptation. When the eye is adapted to night vision it can see dimmer objects than when it is not adapted. Think for example when you go out of the house at night from the fully illuminated bright room, you are not able to see any dim objects, except the brightest objects, for example the lights around you. But after several minutes you start seeing some stars on the sky, and with time more and more. That means that your eyes slowly have adapted to night vision. Unfortunately, for total adaptation the eye needs 20-25 minutes. This applies more for persons who are adults, in their forties and older. For younger people, which iris is still elastic and can become larger easily, the time it takes for the eye to adapt to night seeing is about twice shorter.