Hi Mimi,
Yups both of us got ready in the suite (remember to ask the hotel for early check-in), and the MUA also helped my husband do his hair. We didn't have gate crash as we are both already there. On the other hand, all our brothers and sisters were already there with us when we were getting ready so it's really nice, like a party that starts from early morning. They hung around, got ready and got dressed (we are a small group), listen to music, napped, chitchat, eat breakfast together etc in the suite living room . Very cosy and relaxed feel. We had lots of great (and hilarious) pics of the morning get-ready session, with all the brothers and sisters. Logistically it is also neater (my personal feelings), as everyone is there from the start and can set off at the same time, no last minute delays etc.
I didn't want to chu jia from my house as my room is a bit cramped, old-looking and it doesn't make for nice pictures.
My mum had her buffet at home, as we went there for tea ceremony and she prepared some food for the relatives. I suppose you can gently discourage your mum by saying it is 2 rounds of food (and costs) to feed the gatecrashing round and then the tea ceremony round.
Weddings are stressful, it's about managing expectations and many times people say weddings are for parents. I don't disagree but I also strongly feel that it's for the bridal couple, once in a lifetime, surely we can at least enjoy the day and have the "format" we want!