tThe tTrip

I will go tThis weekend I will go to the biteach with my family , w. We will leave on Saturday morning .

tThe tTrip

In a title, generally all words are capitalised. Even outside of titles, at least the first word will be.

I will go this weekend to the biteach with my family , we will leave on Saturday morning .

Be careful about the word "bitch"! It can be an offensive term for women. The word you meant was "beach".

Today is Friday , iI am packing the bags and my mom is preparing the food for the trip . On Saturday morning my dad will pack the car .

(1) There is no spacing before punctuation.
(2) The pronoun "I" is always capitalised.

I guesshope the trip will be cool.

Here, "I guess" carries an indifferent tone, making it seem like you're not excited about the trip. If that was your intention, then your original sentence is fine. Otherwise, you can consider using "hope" instead.