Should my buy side advisor attend meetings with the sell-side team?

https://shaughnessy.group/search explains our buy-side advisory services, process and timing

I am a full service buy side advisor. My claim to fame (my clients words) is on the front end of finding and bringing to the table business owners who are not listed by a broker or on the internet. I spend 50% of my time talking to and "controlling" sellers. I usually have a minimum of 2 conversations with the seller prior to my client. I am always involved with most and especially the first conversation. Our clients are the "A" list of business buyers, those who are qualified, realistic and determined to buy a business. Most have been involved in M&A deals in the past and understand the value we bring to the table, from finding and starting a conversation with the right buyer, negotiating the LOI, working with the banks (who will usually provide a discount to our clients as the chances of succeeding is greatly raised, so less work for them), helping with the DD, wearing the black hat if needed, controlling expectations, reducing legal fees, all of which reduces time frames, lowers costs and raises the chance of getting to the deal table. So to answer your initial question, using the right buy side advisor that will help throughout the process and who will attend meetings will benefit a buyer greatly.